Forex Swap Calculator — Overnight Rollover Cost
Overnight swap fees erode swing trade profits faster than most traders expect — enter your pair, lot size, and holding days to see the exact cost or credit for holding past the 5 PM EST rollover. Wednesday is triple-charged; a week-long EUR/USD long at 1 standard lot typically costs $30–$50. Know before you hold.
Updated · Reviewed by Foysal Mostafa
Wednesday = 3 nights (triple swap)
Swap Result
Total Swap (3 nights)
-19.50 USD
Per Night
-6.50
Swap Type
✗ Debit
Swap rate for EUR/USD long: -6.50 USD/lot/night · Rates are indicative and vary by broker.
Why Use the Swap / Rollover Calculator?
A swing trade that looks profitable on the chart can become a loser once nightly swap fees are deducted over multiple days. This calculator shows the exact overnight financing cost for any holding period — essential for swing traders who hold positions days or weeks rather than closing intraday.
Formula Used
Swap = Lot Size × Contract Size × Swap Rate × Days / 360Worked Example
You hold 1 standard lot of EUR/USD long for 6 nights. Swap rate = −$5.40/night. Wednesday rollover is triple-charged: 3 days paid in one night. Standard nights (5): 5 × $5.40 = $27.00. Wednesday night (1): $5.40 × 3 = $16.20. Total swap cost = $27.00 + $16.20 = $43.20 for the week. Your trade must earn more than 43.2 pips to be profitable after carry costs.
How to Use the Swap / Rollover Calculator — Step by Step
- 1
Select your currency pair
Choose the forex pair you are holding. Each pair has a different swap rate based on the interest rate differential of the two currencies.
- 2
Choose your position direction
Select Long (buy) if you bought the base currency, or Short (sell) if you sold it. Long and short swap rates differ for every pair.
- 3
Enter your lot size
Type the size of your position in lots. Standard lot = 1.0, mini lot = 0.1, micro lot = 0.01.
- 4
Enter the number of days
Enter how many nights you plan to hold (or have held) the position. Wednesday rollover counts triple to account for the weekend.
- 5
Read the swap cost or credit
The result shows total swap in USD — negative means you pay, positive means you earn. Use this to decide if holding the position is worth the carry cost.
What Your Swap / Rollover Calculator Results Mean
Swap per Night
The overnight financing charge or credit for holding the position one night. Negative means you pay; positive means you earn.
Wednesday Rollover
The swap charged on Wednesday night, which is tripled to account for the weekend settlement days. If holding through Wednesday, factor in this larger charge.
Total Swap for Holding Period
The combined financing cost or credit for the number of days you plan to hold. Compare this against your take-profit target to ensure it remains profitable after carry costs.
Swap / Rollover Calculator — Frequently Asked Questions
Q.What is a forex swap?
A forex swap (rollover fee) is the interest paid or earned for holding a position overnight past 5 PM EST (the daily rollover cut-off). It reflects the interest rate differential between the two currencies. If you buy a currency with a higher interest rate, you may earn positive swap.
Q.Why is Wednesday swap tripled?
Forex trades settle T+2 (two business days after the trade date). A trade opened on Wednesday settles on Friday — if held overnight, it rolls to the next value date which is Monday, spanning the weekend. Brokers charge/credit three days of swap on Wednesday night to account for the Saturday and Sunday settlement.
Q.Which pairs have positive swap?
Pairs where you are long a high-interest currency vs a low-interest one can have positive swap. Historically, being long AUD/JPY, NZD/JPY, or USD/JPY earned positive carry due to Japan's near-zero interest rates. Rates change with central bank policy.
Q.How do I minimise swap costs?
Close positions before 5 PM EST to avoid rollover, use a swap-free (Islamic) account if your broker offers one, trade pairs with positive carry in your direction, or focus on short-term trades that are closed within the same day.
Q.What is a swap-free (Islamic) forex account?
A swap-free account charges no overnight interest (swap) to comply with Islamic Sharia law, which prohibits earning or paying interest (riba). Instead, brokers may charge a flat administration fee after a set number of nights. Swap-free accounts are available to traders of all religions at most major brokers. They are popular with swing traders who hold positions for multiple days to avoid swap costs.
About the Author
Forex Trader & Software Developer · Founder, TradeCalc
Active forex trader since 2019, specializing in risk management and systematic position sizing. Built TradeCalc to replace manual spreadsheets used in live trading. Every calculator is cross-verified against broker platforms before publishing.
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