SPY Options Contracts Risk Calculator
Inputs (edit blue cells)
Account Size ($)
Max Risk % per Trade
Planned Stop % of Premium (stop-based method)
Hard Cap Contracts (safety)
Reward:Risk Ratio (for stop/target)
Contract Multiplier
Fee per Contract per Side ($)
Slippage Allowance (per contract, round trip, $)
Tip: If you don’t place a stop order and you exit manually, sizing closer to Full Premium is safer.
Option Premium (per contract, $)
Enter premium quickly
Example: 0.75 (this is the option price, not SPY price)
$
Outputs (calculated)
Risk $ Allowed
$0.00
Full Premium
$ Risk per Contract
$0.00
Max Contracts
0
Total Risk at Max
$0.00
Suggested Contracts (Conservative)
0
Stop-Based
$ Risk per Contract
$0.00
Max Contracts
0
Total Risk at Max
$0.00
Suggested Contracts (Stop-Based, capped)
0
Stop & Target (based on entry premium and stop %)
Stop Loss Price (premium, $)
$0.00
Take Profit Price (premium, gross RR)
$0.00
Risk per Contract (gross, $)
$0.00
Reward per Contract (gross, $)
$0.00
Take Profit Price (net-adjusted for fees/slip, $)
$0.00
Net Profit per Contract at TP (using net-adjusted TP, $)
$0.00
Warnings / sanity checks
Stop-based max contracts can become unrealistically large if stops slip or fills are poor.
Flag if stop-based contracts > full-premium contracts × 5
OK
Flag if premium is low (fees dominate small scalps)
OK