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Precision tools for physics, astronomy, aerospace & nuclear science. Built for students, researchers, and curious minds everywhere.

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All Calculators

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Kinetic Energy
Calculate kinetic energy from mass and velocity. KE = ½mv²
Physics
Enter values above →
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Gravitational Force
Newton's law of universal gravitation between two masses
Physics
Enter values above →
🌊
Wave Calculator
Find frequency, wavelength or speed using v = fλ
Physics
Enter values above →
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Photon Energy
Calculate photon energy using Planck's equation E = hf
Physics
Enter frequency or wavelength →
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Ohm's Law
Solve for voltage, current or resistance using V = IR
Physics
Enter values above →
🎯
Free Fall Calculator
Time and velocity of free fall from height h
Physics
Enter height above →
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Distance Converter
Convert between light-years, parsecs, AU, km and miles
Astronomy
Enter distance above →
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Escape Velocity
Min speed to escape a planet's gravity: v = √(2GM/r)
Astronomy
Select a planet or enter values →
🌙
Moon Phase Finder
Find the lunar phase for any date
Astronomy
Pick a date above →
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Orbital Period
Kepler's third law: T² ∝ a³ — find orbit time
Astronomy
Enter orbital values →
✈️
Mach Speed Converter
Convert between Mach number, km/h, mph and m/s
Aerospace
Enter speed above →
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Thrust-to-Weight Ratio
Check if your rocket can lift off: TWR = Thrust / (Mass × g)
Aerospace
Enter values above →
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Delta-V (Tsiolkovsky)
Rocket equation: Δv = Isp × g₀ × ln(m₀/mf)
Aerospace
Enter values above →
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Orbital Speed
Circular orbital velocity: v = √(GM/r)
Aerospace
Enter values above →
☢️
Radioactive Decay
Find remaining activity using N(t) = N₀ × e^(-λt)
Nuclear
Enter values above →
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Half-Life Reference
Quick lookup of common radioactive isotope half-lives
Nuclear
Select an isotope above →
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Mass-Energy (E=mc²)
Convert mass defect to released energy using Einstein's equation
Nuclear
Enter mass above →