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Calcimator

Reentry Heating Calculator

Estimate stagnation-point heating rate, temperature, and total heat load during atmospheric reentry using the Sutton-Graves correlation.

Inputs

m/s
km
m
kg

Results

Stagnation Heating Rate

2,682,077.22 W/m²

Stagnation Temperature

2,731.29 K

Total Heat Load1,385.6 MJ/m²
Peak Deceleration1.54 g
How to Use This Calculator
  1. Enter entry velocity (km/s), altitude (km), and vehicle nose radius (m).
  2. Set vehicle mass (kg) and drag coefficient (Cd) for your vehicle geometry.
  3. Review stagnation heating rate (W/cm²), stagnation temperature (K), and total heat load (MJ/m²).
  4. Use peak deceleration (g) to verify structural and human factors limits are not exceeded.
  5. Select thermal protection system thickness based on the total heat load output.
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