Forex Swap Calculator

Calculate the overnight swap (rollover) cost or credit for holding a forex position. Enter the pair, lot size, swap rate in points, and number of nights to find the total financing charge in your account currency.

Find this in your broker's swap table. Negative = cost you pay; positive = credit you receive. Wednesday nights typically triple-charge.

Exchange Rate

USD is both the quote currency and your account currency — enter 1.0.

Formula

Three-step formula

Pip Value/Lot Pip Value/Lot = Pip Size × 100,000 × Quote→Account Rate
Per Night Swap/Night = Lots × Swap Rate (points) × Pip Value/Lot
Total Swap Total = Swap/Night × Nights

Negative total = charge deducted from your account · Positive total = credit added to your account

Worked Example

Given

EUR/USD · 1 lot · swap rate −0.5 points/night · 3 nights · USD account · rate = 1.0

Pip Value / Lot
0.0001 × 100,000 × 1.0 = $10.00
Swap Per Night
1 × (−0.5) × $10.00 = −$5.00
Total Swap (3 nights)
−$5.00 × 3 = −$15.00

Frequently Asked Questions

What is a forex swap or rollover?
In forex, trades that remain open past the daily rollover time (typically 5pm New York) are "rolled over" to the next trading day. The swap (also called rollover or overnight interest) is the interest rate differential between the two currencies in the pair. If you hold a high-yielding currency and sell a low-yielding one, you receive a swap credit; the opposite results in a swap charge.
What are swap points and how do I find them?
Swap points (also called rollover points) are the nightly financing charge expressed in the quote currency per lot. Your broker publishes separate long and short swap rates for each pair in their product specifications or trading platform. Negative swap points mean a cost to you; positive points mean you receive a credit. Enter the rate for your specific trade direction (long or short).
Why does Wednesday carry a triple swap charge?
Forex trades settle on a T+2 basis (two business days after the trade date). To account for the weekend (Saturday and Sunday) when markets are closed, the swap charge for a trade rolled over on Wednesday night covers three calendar days of financing instead of one. This is standard practice across all major brokers.
How does account currency affect the swap calculation?
The swap rate is denominated in the quote currency of the pair. To convert it to your account currency, the calculator multiplies by the pip value per lot, which itself uses the Quote→Account Rate. For EUR/USD with a USD account, no conversion is needed (rate=1.0). For GBP/JPY with a USD account, the JPY swap is converted to USD using the JPY/USD rate.
Are swap-free (Islamic) accounts affected?
Swap-free (Islamic) accounts do not charge or pay overnight swap — instead, they typically charge an administration fee after a set number of days. This calculator assumes standard swap accounts. Check with your broker for the specific fee structure on Islamic accounts.