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Gravity & Orbital Calculator

Calculate orbital velocity, gravitational force, escape velocity, and Hohmann transfer orbits — with presets for Earth, Moon, Mars, Jupiter and more

Parameters

Orbital Velocity
7.672 km/s
7672.5 m/s
Orbital Period
1.54 hours
Orbital Radius
6771 km
Surface Gravity
9.820 m/s²
Gravity at Altitude
8.6940 m/s²

Orbital Mechanics Formulas

Gravitational Force
F = G × m₁ × m₂ / r²
Orbital Velocity
v = √(G × M / r)
Orbital Period
T = 2π × r / v
Escape Velocity
v_esc = √(2GM / r) = √2 × v_orb
Gravitational Constant
G = 6.674 × 10⁻¹¹ m³/(kg·s²)
Hohmann Δv
Δv = |v_t1 − v_1| + |v_2 − v_t2|

Celestial Body Reference

BodyMass (kg)Radius (km)Surface gEscape v
🌍 Earth5.972e+2463719.82 m/s²11.19 km/s
🌙 Moon7.342e+2217371.62 m/s²2.38 km/s
🔴 Mars6.417e+2333903.73 m/s²5.03 km/s
🟠 Jupiter1.898e+276991125.92 m/s²60.20 km/s
☀️ Sun1.989e+30695700274.28 m/s²617.77 km/s
🟡 Venus4.867e+2460528.87 m/s²10.36 km/s
🪐 Saturn5.683e+265823211.19 m/s²36.09 km/s
Mercury3.301e+2324403.70 m/s²4.25 km/s

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