Projectile Motion Calculator

From launch speed and angle, compute range, max height, flight time and impact speed — with gravity presets for the planets.

Checking a homework answer, sizing something before building it, and getting an order of magnitude before committing to a design — a torque on a bolt, the force a spring returns, the frequency a circuit resonates at, how long light takes to arrive.

Feeding in a value in the wrong unit. Physics formulas assume SI throughout, so grams instead of kilograms or centimetres instead of metres shifts the answer by powers of ten without any warning.

They sit next to each other but answer different questions. Angular Velocity Calculator: convert RPM, rad/s, Hz and period, or derive ω from a linear speed and radius — with tangential speed and centripetal acceleration. Pick whichever matches what you're starting from — both are free.

Coulomb's Law Calculator is the closest one after this: Solve F = kq₁q₂/εᵣr² for the force, either charge or the distance, in any of 18 dielectric media, with charges in C, µC, nC or elementary charges, plus the potential energy and the field at q₂.

de Broglie Wavelength Calculator and Decibel (dB) Calculator — they come up in the same task often enough to be worth a second tab.

Constants are the CODATA values and the formulas are the textbook ones. Most assume an idealised case — no air resistance, no friction, a point mass — and the tool says so where the simplification matters.