Math & Numbers
Calculate the overall ratio and output speed of a multi-stage gear train. i_total = i₁·i₂·…·iₙ (each i = z₂/z₁). Enter tooth pairs per stage and the input speed to get the final output speed.
gear-train-speed-ratioFinance
Project today's amount (plus optional recurring contributions) forward with compound interest (FV). Supports a lump sum or lump sum + annuity, multiple compounding frequencies, a growth curve, and a per-period breakdown. FV = PV*(1+r)^n for a lump sum.
future-value-calculatorMath & Numbers
Convert between frequency and wavelength with selectable medium; results in all common frequency and length units
frequency-wavelengthMath & Numbers
Compute distance, time, or final velocity for free fall from rest, given any one plus gravity
free-fall-calculatorMath & Numbers
Compute force, mass, or acceleration from Newton's second law, with weight on Earth
force-calculatorMath & Numbers
Solve pressure, volume, temperature, or moles with the Ideal Gas Law (PV=nRT) or Combined Gas Law; also gas density and molar mass.
gas-law-calculatorMath & Numbers
Plot one or more y=f(x) expressions, mark roots and extrema, and generate SVG-ready graph output
function-equation-plotterMath & Numbers
Convert gigabytes to bytes with decimal vs binary interpretation, alternate-system comparison, and network-speed-aware transfer estimates
gb-to-byteMath & Numbers
Convert gigabytes to gibibytes with decimal vs binary interpretation, alternate-system comparison, and network-speed-aware transfer estimates
gb-to-gibMath & Numbers
Convert gibibytes to gigabytes with decimal vs binary interpretation, alternate-system comparison, and network-speed-aware transfer estimates
gib-to-gbMath & Numbers
Convert gigabytes to bits with decimal vs binary interpretation, alternate-system comparison, and network-speed-aware transfer estimates
gb-to-bitsMath & Numbers
Convert gigabytes to megabytes with decimal vs binary interpretation, alternate-system comparison, and transfer estimates
gb-to-mb