Free Science Calculators β€” No Sign-up Required

Calculate the
Universe

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

Explore All Tools β†’ Start with Physics
20+
Free Tools
4
Science Fields
100%
Free Forever
∞
Calculations
⚑
Instant Results
Real-time calculation as you type
πŸ“±
Mobile Ready
Works perfectly on any device
πŸŽ“
With Formulas
See the equation behind every result
πŸ”’
No Account
Just open and calculate, always free
// science tools

All Calculators

πŸ”
⚑
Kinetic Energy
Calculate kinetic energy from mass and velocity. KE = Β½mvΒ²
Physics
Enter values above β†’
🌍
Gravitational Force
Newton's law of universal gravitation between two masses
Physics
Enter values above β†’
🌊
Wave Calculator
Find frequency, wavelength or speed using v = fΞ»
Physics
Enter values above β†’
πŸ’‘
Photon Energy
Calculate photon energy using Planck's equation E = hf
Physics
Enter frequency or wavelength β†’
πŸ”Œ
Ohm's Law
Solve for voltage, current or resistance using V = IR
Physics
Enter values above β†’
🎯
Free Fall Calculator
Time and velocity of free fall from height h
Physics
Enter height above β†’
🌌
Distance Converter
Convert between light-years, parsecs, AU, km and miles
Astronomy
Enter distance above β†’
πŸš€
Escape Velocity
Min speed to escape a planet's gravity: v = √(2GM/r)
Astronomy
Select a planet or enter values β†’
πŸŒ™
Moon Phase Finder
Find the lunar phase for any date
Astronomy
Pick a date above β†’
πŸͺ
Orbital Period
Kepler's third law: TΒ² ∝ aΒ³ β€” find orbit time
Astronomy
Enter orbital values β†’
✈️
Mach Speed Converter
Convert between Mach number, km/h, mph and m/s
Aerospace
Enter speed above β†’
πŸ›Έ
Thrust-to-Weight Ratio
Check if your rocket can lift off: TWR = Thrust / (Mass Γ— g)
Aerospace
Enter values above β†’
πŸš€
Delta-V (Tsiolkovsky)
Rocket equation: Ξ”v = Isp Γ— gβ‚€ Γ— ln(mβ‚€/mf)
Aerospace
Enter values above β†’
πŸ›°οΈ
Orbital Speed
Circular orbital velocity: v = √(GM/r)
Aerospace
Enter values above β†’
☒️
Radioactive Decay
Find remaining activity using N(t) = Nβ‚€ Γ— e^(-Ξ»t)
Nuclear
Enter values above β†’
⏱️
Half-Life Reference
Quick lookup of common radioactive isotope half-lives
Nuclear
Select an isotope above β†’
βš›οΈ
Mass-Energy (E=mcΒ²)
Convert mass defect to released energy using Einstein's equation
Nuclear
Enter mass above β†’