Swap Calculator

In Forex trading, keeping a position open overnight can either cost you money or earn you money. This depends on the difference in interest rates between the two currencies. A swap calculator helps you easily find out the cost or benefit of holding a forex trade overnight, so you can plan your trades better and manage your risk properly.

Enter details and calculate to see results

What Is a Swap in Trading?

A Forex overnight swap is the interest payment that is adjusted overnight on a position that you did not close at the end of the trading day. When you are trading in Forex, you are actually buying one currency and selling another at the same time. As every currency has its interest rate, the difference between the two interest rates will either lead to a cost or credit when the position is held overnight.

If you hold your trade after the trading day ends, your stockbroker adjusts your account based on the difference between the two interest rates. If the currency you buy has a higher interest rate than the one you sell, you earn interest (credit) and pay the interest (cost) for a lower interest rate.

Example of Swap Charges

Suppose you buy 1 standard lot of EUR/USD of a lot size of 100,000 units at 1.1350. The EUR interest rate is 0%, whereas the USD interest rate is 0.25%. You held the trade overnight. If your broker's swap rate is -$3.50 per night, you will incur a swap cost of $3.50, which will be deducted from your account as you are buying EUR (lower rate) and selling USD (higher rate).

What Is a Swap Calculator?

A Swap calculator is an online tool that assists you in estimating the interest charge or credit that the broker will charge on a position you are holding overnight. It eliminates the need to calculate the swap charges manually. Instead, it offers you a quick and accurate estimate of the impact of holding costs on your trade based on your trade information. It is ideal for traders who:

  • Hold positions for multiple days
  • Trade instruments with significant interest rate differences
  • Want to know the actual cost of trading
  • Follow swing or position trading strategies

You can incorporate carrying costs into your planning by using the Swaps calculator before executing or holding a trade overnight.

How a Swap Calculator Works

The tool requires entering the information like the trading instrument, position size (lot size), the direction of the trade (buy or sell), and the number of nights you intend to maintain the position. This allows you to know beforehand whether it will be more profitable to keep the trade open or whether it will incur extra expense.

How to Use the Swap Calculator

Here are the steps you can follow to use the swaps calculator online:

  1. Choose the trading instrument: Select the trading instrument or currency pair you are trading, like INR/USD.
  2. Enter trade details: Provide trade details like the lot size (100,000 standard, 10,000 mini, or 1,000 micro lot).
  3. Direction of trade: Specify whether you are selling (short) or buying (long), as the long and short positions have different swap rates.
  4. Specify the holding period: Enter the number of nights you are going to leave the trade open.
  5. Calculate swap amount: The calculator will multiply the lot size and the swap rate by the number of nights to give the total cost or credit.
  6. View results: You immediately know how the trade will impact your total profit or loss by holding it overnight.

With the help of a swap calculator, you can plan and make informed decisions on whether to retain a position overnight. It is particularly useful to swing traders or to traders who are trading currencies with large interest rate differentials.

Factors That Affect Swap Charges

The amount you will pay or earn when you hold a trade overnight depends on the following factors:

1. Long and Short Swap Rates

The rates of swap vary when you purchase (long) or sell (short) a position. The brokers charge different rates in each direction of the trade, depending on the difference in the interest rates of the currencies.

  • Long positions can gain or receive interest based on the rate of the base currency.
  • Short positions generally reverse the impact of long trades.

As an example, purchasing EUR/USD can get a small credit overnight, whereas selling it can attract a swap fee.

2. Number of Nights Held

Swap fees are charged on a per-night basis and therefore the longer you stay in a position, the higher the overall cost or credit on a nightly basis. It can also be charged triple to traders who are in positions over weekends with some brokers to cover the non-trading days.

3. Instrument Type

The number of swaps depends on the instrument that is being traded. Overnight adjustments can be made to forex pairs, commodities, indices and CFDs. These factors are underlying interest rates, liquidity and the rules of the broker.

Swap Charges Across Different Markets

The amount of swap charges will depend on the market you are trading in. The factors that affect the overnight costs or credits in each market are unique. Here is how the swap charges vary across different markets:

1. Forex

Swap charges in the Forex market are computed on the interest rate difference between the two currencies in a pair. A swap credit can be earned by purchasing a currency at a higher interest rate than the currency being sold.

Purchasing a currency that has a lower interest rate can lead to a swap fee. Forex swaps are charged on a nightly basis, and traders who have positions over the weekend could incur triple the swap fees to cover the non-trading days.

2. Commodities and Indices

In the case of commodities (such as gold or oil) and indices (such as Nifty or S&P 500), swaps are typically determined based on financing costs and not on interest rate differentials. A long position that is held overnight typically carries a financing fee. Depending on the lending costs of the broker and the market structure, short positions can yield or pay a lower fee.

3. CFDs

Contracts for Difference (CFDs) are derivative products, and swap fees are charged depending on the price of holding the underlying asset overnight. Traders normally pay a financing fee to hold long CFD positions.

In short positions of CFD, traders can be given a small credit or a fee based on the underlying asset and the rules of the broker. A Swaps calculator allows you to approximate the cost of overnights in Forex, commodities, indices, and CFDs without having to look up the rate of each market individually.

Why Swap Charges Matter for Traders

Here is why swap charges matter for traders who trade in Forex:

  • Impact on profit and loss: Overnight swap rates either increase or decrease your trade profit based on whether you are paying or earning interest.
  • Strategic trade planning: The awareness of swap charges assists traders in knowing when to enter and exit trades.
  • Managing carrying costs: When you consider swap charges in your trading strategy, you can:
    • Eliminate unforeseen declines in profits.
    • Change the size of positions to control costs.
    • Select trades which are less expensive to hold overnight.

Overnight swap charges can significantly impact your trading results, especially when positions are held for multiple days. Dealing.com’s Swap calculator helps you accurately estimate overnight charges or credits in advance for smarter planning and better risk management.


Frequently asked Questions

We’ve gathered answers to the most common questions to help you get started quickly and confidently.

What is the difference between the swap charges on long and short positions?

The swap rates are determined by the interest rate difference between the currencies or the financing cost of the instrument, which varies with the long or short position.

What is the frequency of swap charges?

The swap charges are charged on a single open position per night, and triple swaps on Forex positions may be charged on weekends.

Are all brokers equal in terms of swap rates?

No, the swap rates are different according to the broker, type of account and trading platform. A Swaps calculator ensures that you get the right calculations with your particular broker.

How can I estimate the total overnight cost for multiple positions?

You can use a Swap calculator to quickly compute the aggregate overnight charges of all trades by entering your positions into the calculator.

Are all trading instruments subject to swaps?

Swaps are usually used on Forex, CFDs, commodities and indices, although the calculation process can vary based on the market.