A European company signs a contract: in twelve months it will receive 100,000 dollars. Today those are worth a certain amount in euros, but in a year? If the dollar weakens, that payment could be worth thousands of euros less. This is exchange risk, and currency hedging exists to remove it. The most common tool is the forward contract: it fixes today the rate at which you will convert in the future. But here is what almost no one explains: a forward does not lock in today's exchange rate. It locks in the forward rate, which is the spot adjusted for the interest-rate differential between the two currencies. This calculator gives you the forward rate, the guaranteed value in your currency and — above all — the annual cost (or gain) of hedging, so you understand in advance what you are really fixing. It is parametric: it works for any currency pair and country.

What currency-risk hedging is

Currency-risk hedging is the set of techniques by which anyone with exposure in a currency other than their own removes the uncertainty about future value. Exchange risk arises whenever you will receive or pay a sum in a foreign currency on a future date: in the meantime the exchange rate moves, and the value in your currency changes. An exporter who will be paid in dollars fears the dollar weakening; an importer who must pay in dollars fears it strengthening; an investor with foreign securities fears the currency of those securities falling. Hedging means fixing today the future value, giving up favorable movements in exchange for certainty. It is not speculation: it is risk management. This calculator focuses on hedging a future receipt in foreign currency through a forward contract, the most widespread form; for a future payment the logic is mirror-image.

What a forward contract is

A forward contract is an agreement to exchange two currencies at a future date and at a rate fixed today, the forward rate. Unlike a "spot" (immediate) exchange, the forward settles the transaction later: you sign now, you exchange at maturity. The advantage is certainty: you know exactly how many euros (or your currency) you will receive for your dollars, regardless of where the rate is on that date. The forward is quoted by banks and is typically "over the counter" (tailored to amount and maturity), unlike exchange-standardized currency futures. It generally requires no upfront premium (unlike options): the cost is implicit in the forward rate itself, which can be better or worse than spot. Understanding how that rate is formed is the heart of this instrument.

How the forward rate is calculated

The forward rate is neither a forecast nor an arbitrary quote: it derives from a precise formula. You start from the spot rate and adjust it for the ratio between the interest rates of the two currencies over the horizon considered. In formula (money-market convention, simple interest): forward rate = spot × (1 + home rate × t) / (1 + foreign rate × t), where t is the horizon in years (months/12). With spot 1.10, home rate 4%, foreign rate 2% and a 12-month horizon: forward = 1.10 × (1 + 0.04) / (1 + 0.02) = 1.10 × 1.0196 = 1.1216. The forward is above spot because the home currency yields more than the foreign one. The difference between forward and spot is called "forward points" and reflects exactly the interest-rate differential. The calculator applies this formula and shows you the forward rate for your pair and horizon.

Covered interest parity: the heart of the calculation

Why does the forward depend on interest rates? Because of a principle called covered interest parity. It is a no-arbitrage relationship: if the forward were not exactly that value, an operator could profit risk-free by borrowing in one currency, converting, investing in the other and hedging with the forward. This arbitrage possibility pushes the forward toward the only level consistent with the rates. The practical result: hedging does not let you lock in today's spot, but a rate that already incorporates the interest advantage (or disadvantage) between the two currencies. If your currency yields more than the foreign one, the forward is better than spot for someone receiving foreign currency (you are "paid" to hedge); if it yields less, it is worse (you pay to hedge). This is the key insight, and the calculator translates it into the annual hedging carry.

Why the forward rate is not a forecast

A very widespread misconception: thinking the forward rate is the market's forecast of where the rate will be at maturity. It is not. The forward is determined solely by the interest-rate differential, through covered parity, not by an opinion about the future. The actual rate at maturity will almost certainly differ from the forward: it may be above or below. Hedging with a forward means giving up both the risk of an unfavorable movement and the possibility of a favorable one, in exchange for certainty. You are not "betting" that the rate will go as the forward says: you are removing the bet. Whoever stays unhedged, instead, is effectively accepting exchange risk, whether they want to or not. The "expected spot" field of the calculator serves exactly to compare the hedged (certain) value with a hypothetical unhedged scenario: it is not a forecast by the calculator, but your assumption for reasoning.

Carry: when hedging costs and when it pays

The hedging carry is the annualized cost (or gain) of hedging, and it coincides with the interest-rate differential. The calculator expresses it as an annual percentage. If it is positive, the forward is above spot and someone receiving foreign currency obtains more by hedging: the hedge "pays". If it is negative, the forward is below spot and hedging "costs" in carry terms. The table shows the forward rate for various differentials, with spot 1.10 and a 12-month horizon:

Notice how the forward rate rises above spot when your currency yields more and falls below when it yields less. The carry is almost equal to the interest-rate differential: it is the implicit "price" of hedging, known in advance. The calculator tells you exactly which row your situation is on.

Hedged versus unhedged: certainty or gamble

The underlying decision is between certainty and exposure. By hedging, you fix the value in your currency: whatever the rate does, you will receive the guaranteed amount. Staying unhedged, the final value will depend on the rate at maturity: it may be higher (if the rate moves in your favor) or lower (if it goes against). The table compares a receipt of 100,000 units of foreign currency hedged at forward 1.1216 (guaranteed value 112,157) with various unhedged scenarios:

Hedging protects you when the foreign currency falls, but makes you "lose" the gain if it rises. The point is not to guess: it is to decide whether you can afford the uncertainty. For a company with thin margins, certainty is often worth more than the potential gain. The calculator shows the difference relative to the scenario you assume.

Who hedges exchange risk

Currency hedging concerns anyone with flows in a currency other than their own. Exporters, who receive in foreign currency and fear it devaluing. Importers, who pay in foreign currency and fear it revaluing. Multinationals, which consolidate accounts across several currencies. Investors with shares, bonds or funds denominated in foreign currency, who can hedge the exchange risk to isolate the asset's return from the currency movement. Travelers and expatriates with future income or expenses in another currency. In all these cases the question is the same: do I want the certainty of the value in my currency, or do I accept the swing? The calculator is designed for a future receipt (exporter/investor perspective), but the logic of the forward rate and carry applies to anyone.

Full, partial or dynamic hedging

Hedging is not an on/off switch. Many adopt a partial hedge: fixing only part of the exposure (for example 50-70%), leaving the rest unhedged. This reduces risk without entirely giving up a possible favorable movement, and without "over-hedging" if the receipt is uncertain. Others use a dynamic or "layered" hedge, increasing the hedged share as maturity approaches and the exposure becomes certain. The choice depends on the certainty of the flow (a signed contract is different from a sales forecast), on risk tolerance and on the carry: if hedging pays (positive carry) there is less reason to leave it unhedged. The calculator helps you assess the cost/benefit of hedging the full amount; for a partial hedge, apply the same logic to the share you intend to fix.

The instruments and differentials around the world

The forward is the simplest instrument, but not the only one. Currency options give the right (not the obligation) to exchange at a fixed rate: they protect from unfavorable movements while leaving favorable ones open, but cost a premium. Currency swaps combine spot and forward exchanges, used for recurring flows. Futures are exchange-standardized forwards. The hedging carry, that is the interest-rate differential, varies enormously by currency pair, as the table shows:

This is why hedging a high-yield emerging currency is expensive, while hedging between developed currencies at similar rates is almost free. This aspect is universal: it changes with the pair and the moment, but the logic of covered parity is the same everywhere. The calculator applies it to any combination of rates you enter.

Hedging and time horizon

The horizon affects two fronts. First, the forward rate: the more distant the maturity, the more the interest-rate differential accumulates, so the more the forward moves away from spot (for better or worse depending on the carry). A 2% differential over one year shifts the forward by about 2%; over three years, by about 6%. Second, the uncertainty hedged: the longer the horizon, the more the rate can move, so the greater the risk you are removing by hedging. For very distant exposures, however, the certainty of the flow often decreases (a sale expected in three years is less sure than one invoiced today), which pushes toward partial or dynamic hedges. The calculator lets you vary the horizon in months and see how the forward rate, hedged value and carry change: try different horizons for your exposure.

Hidden costs, spread and counterparty risk

The "theoretical" forward rate from the formula is a starting point; in reality there are additional costs. Banks apply a spread between the forward they offer you and the theoretical one: it is their margin, and it slightly worsens the rate relative to the pure calculation. There may be a credit line or margin required to open the forward, which ties up resources. There is counterparty risk: if the bank fails before maturity, the contract might not be honored (reduced by using solid counterparties or regulated markets). For options, the cost is the explicit premium. The calculator works on the theoretical forward rate from covered parity: for a realistic estimate, consider that the actually quoted rate will be a little less favorable because of the spread. Always ask your bank for the "all-in" forward rate and compare it with the theoretical one.

Common mistakes

Some typical mistakes. First: believing the forward locks in today's spot — it locks in a rate adjusted for interest rates, which can be very different. Second: interpreting the forward as a forecast and hedging or not "because the forward says it will rise" — the forward predicts nothing. Third: looking only at the rate and ignoring the carry, that is the annual cost/gain of hedging. Fourth: over-hedging, fixing more than the real exposure or still-uncertain flows, turning the hedge into speculation. Fifth: ignoring the bank spread and counterparty risk. Sixth: hedging (or not) out of emotion instead of a consistent policy. The calculator helps above all on the first three: it makes visible that the forward is determined by rates, is not a forecast, and has a carry to be assessed.

Precautions and warnings

Some warnings. First: this tool calculates the forward rate with covered interest parity (simple interest), a standard but simplified model; real quoted rates include spreads and conventions (act/360, etc.) not shown here. Second: the "expected spot" field is your assumption of a scenario, not a forecast by the calculator nor a guaranteed value. Third: the result does not predict the future rate and guarantees no outcome. Fourth: hedging removes exchange risk but introduces costs, spread and counterparty risk, and makes you give up favorable movements. Fifth: nothing here is financial or investment advice; the decision to hedge depends on your situation, margins and risk policy. Use the calculator to understand the logic of the forward rate and carry, not as a system to decide automatically.

How the calculator works

Enter the foreign-currency amount you will receive, the current spot exchange rate (how many units of your currency per one unit of foreign currency), the interest rate of your currency and of the foreign one over the horizon, the horizon in months and, if you wish, an expected spot rate at maturity as a scenario. The calculator returns the forward rate, the guaranteed hedged value in your currency, the annual hedging carry (positive if hedging pays, negative if it costs) and the difference between the hedged value and the unhedged scenario you assumed. Try changing the two interest rates and watch how the forward rate moves above or below spot: you will grasp covered interest parity instantly.

The data you need

You need five essential pieces of information. The foreign-currency amount of the exposure. The current spot rate of the pair (available in real time everywhere). The interest rates of the two currencies for the horizon considered (roughly the policy rates or money-market rates at that maturity). The horizon in months until the date of the flow. Optionally, an expected spot rate as a comparison scenario. The result is the forward rate, the hedged value and the carry. Remember it is a theoretical estimate from covered parity: the rate actually quoted by your bank will include a spread and be a little less favorable. Use the calculator to assess the logic and order of magnitude, then request a concrete quote for the real operation.

A worked example

Let us look at a concrete case. A European company exports and in 12 months will receive 100,000 dollars. Spot today is 1.10 (euros per dollar, so the receipt would be worth 110,000 at current values). It fears the dollar weakening. The euro interest rate is 4%, the dollar's 2%. The forward rate is 1.10 × (1 + 0.04) / (1 + 0.02) = 1.1216. Here is the surprising point: by hedging, the company does not lock in today's 1.10, but a better rate, 1.1216, because the euro yields more than the dollar (positive carry of +1.96% per year). The guaranteed value becomes 100,000 × 1.1216 = 112,157: more than the 110,000 at current spot. And if the dollar really fell to 1.07 as feared, the hedge would save 112,157 − 107,000 = 5,157 versus staying unhedged. In this case hedging not only removes the risk but also improves the rate: the interest-rate differential works in its favor.

Frequently asked questions

What is currency-risk hedging?

It is the set of techniques by which anyone with exposure in a currency other than their own removes the uncertainty about future value. By fixing today the rate at which you will convert in the future (usually with a forward contract), you know exactly what a foreign-currency receipt or payment will be worth in your currency, whatever the rate does.

What is a forward contract?

It is an agreement to exchange two currencies at a future date and at a rate fixed today (the forward rate). You sign now, you exchange at maturity. It gives you certainty over the value in your currency and generally requires no upfront premium: the cost is implicit in the forward rate, which can be better or worse than spot.

Does the forward lock in today's exchange rate?

No, and it is the most common misconception. The forward locks in the forward rate, that is the spot adjusted for the interest-rate differential between the two currencies (covered interest parity). If your currency yields more than the foreign one the forward is above spot; if it yields less, it is below. It can be very different from today's spot.

How is the forward rate calculated?

With covered interest parity: forward = spot × (1 + home rate × t) / (1 + foreign rate × t), where t is the horizon in years. Example: spot 1.10, home rate 4%, foreign 2%, 12 months → 1.10 × 1.04/1.02 = 1.1216. The difference between forward and spot are the "forward points".

Is the forward rate a forecast of the future rate?

No. It is determined solely by the interest-rate differential, not by an opinion about the future. The actual rate at maturity will almost certainly differ. Hedging with a forward is not betting on the forward: it is removing the bet, giving up both the unfavorable risk and the possible favorable gain.

What is the hedging carry?

It is the annualized cost (or gain) of hedging, equal to the interest-rate differential. If positive, the forward is above spot and hedging pays (you are "paid" to hedge); if negative, the forward is below spot and hedging costs. It is known in advance: hedging is never really "free", but its price is calculable beforehand.

Why does hedging an emerging currency cost more?

Because emerging currencies usually have much higher interest rates. The wide differential makes the forward clearly below spot for someone receiving that currency, so the hedging carry is strongly negative. It is the direct effect of covered parity: the higher the foreign currency's rate, the costlier the hedge.

Is it better to hedge or stay unhedged?

It depends on your risk tolerance, margins and the carry. Hedging gives certainty but makes you give up favorable movements; staying unhedged exposes you to the rate swing. For a company with thin margins, certainty is often worth more than the potential gain. Many use a partial hedge as a compromise.

What is a partial hedge?

It is fixing only part of the exposure (for example 50-70%), leaving the rest unhedged. It reduces risk without entirely giving up a favorable movement, and avoids "over-hedging" if the receipt is still uncertain. It is a very common compromise, especially when the future flow is not 100% certain.

Does the calculator include the bank spread?

No: it calculates the theoretical forward rate from covered parity. The bank applies a spread on the forward it offers you, so the actually quoted rate will be a little less favorable. Use the result for the logic and order of magnitude, then ask the bank for the "all-in" forward rate for the real operation.

Does the calculator work for any currency pair?

Yes: it is parametric. Enter the spot rate and the two interest rates of your pair and the calculation works for any combination of currencies and country, in any currency. The logic of covered interest parity is universal; only the differential changes, which you enter based on your situation.

What is counterparty risk in a forward?

It is the risk that the bank or intermediary with whom you signed the forward does not honor the contract (for example due to insolvency) before maturity. It is reduced by using solid counterparties or regulated markets (like exchange futures). The calculator does not quantify it: it is a qualitative factor to consider when choosing the counterparty.

Is the result financial advice?

No. It is a theoretical estimate of the forward rate and carry, with a standard simplified model (covered parity, simple interest), on the data you provide. It does not predict the future rate, does not include real spreads and conventions, and is not financial or investment advice. For a real operation consult your bank or an adviser.

Updated July 2026