Updated: 2026-02-20
Free Slippage Cost Calculator for Traders
Estimate slippage cost from position notional and slippage (in bps) per side. The calculator is free and intentionally simple so you can plan trades quickly without skipping risk logic.
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Slippage Cost Calculator
Estimate slippage cost from position notional and slippage (in bps) per side.
Note
Outputs are only as accurate as your inputs.
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$ slippage-cost
$15
- >Notional: $25000
- >Total slippage: 6 bps
- >Cost % of notional: 0.06%
How to Use the Slippage Cost Calculator
Enter your inputs before you place the trade, not after. Pre-trade planning is where calculators create value.
Use realistic values based on your actual execution conditions. If you understate slippage, fees, or stop distance, output quality collapses.
Document the result inside your journal so you can compare planned vs realized outcomes during review.
Formula (Slippage Cost)
Slippage is the execution tax you pay when price moves during your fills. It tends to spike during volatility and thin liquidity windows.
Use this as a fast translation from bps to dollars so you can decide whether your expected edge actually survives execution conditions.
- •Slippage cost ≈ notional × (slippage bps / 10,000) × sides
- •Total bps = slippage bps × sides
Why This Metric Matters
Most preventable losses come from skipping one simple calculation when markets move fast. This tool enforces the minimum math needed for disciplined execution.
The value compounds when used consistently. One correct risk decision rarely changes a year; repeated correct decisions usually do.
Tie calculator output to your strategy tags so you can evaluate whether your planning assumptions match live performance.
Add It to Your Weekly Workflow
Use this tool at planning time, then compare outcome quality in weekly review sessions.
If planned and realized values diverge, investigate execution behavior before adjusting strategy logic.
Pair this with one behavior correction each week for compounding improvement.
Common Mistakes
Using unrealistic inputs because they feel better emotionally.
Changing parameters mid-trade to justify staying in a bad position.
Treating one output as a signal to trade rather than a risk filter.
Related Resources
FAQ
?Is this Slippage Cost Calculator free to use?
Yes. The calculator is free and available without signup.
?How do I convert slippage (bps) into dollars?
Multiply notional by (slippage bps / 10,000) and then multiply by the number of sides (one-way or round trip). This turns 'a few bps' into a concrete cost you can compare against expected edge.
?When does slippage matter most?
Slippage spikes in high volatility and thin liquidity, especially on market orders and stops. Track it by session and symbol so you can separate strategy quality from execution conditions.
?How accurate are calculator outputs?
Outputs are only as accurate as inputs. Use realistic assumptions and review planned vs realized values weekly.
?Can Tiltless save these values to my journal?
Yes. You can pair tool outputs with your review workflow and setup tags for better post-trade diagnostics.
Track slippage-cost-calculator with Tiltless
See plans and run one weekly review loop with Tiltless: edges, leaks, and enforceable next actions.