Science
13 tools available
Ohm's Law Solver
Given any two of voltage (V), current (A), and resistance (Ξ©), solve for the third. Also returns power (P = V Γ I).
Use Tool1D Kinematics Solver
Solve for any of initial velocity, final velocity, acceleration, time, or displacement given three of the others. Constant-acceleration equations of motion.
Use ToolCircle Solver
Given any ONE of radius, diameter, circumference, or area, compute the other three. Works in any consistent length unit (meters, feet, inches, etc.).
Use ToolFFT Analyzer
Paste a time-domain signal (comma/newline separated samples) and a sample rate. Returns the magnitude spectrum, top 5 peak frequencies, and a visual plot.
Use ToolConductor Resistance
Resistance of a length of wire/cable given its material and cross-section. Uses R = ΟΒ·L/A with resistivity looked up from the materials database.
Use ToolLED Series Resistor
Calculate the series resistor for a single LED. Given supply voltage, LED forward voltage, and desired forward current, returns the required resistance, nearest E12 standard value, and recommended power rating.
Use ToolWire Voltage Drop
Calculate voltage drop over a 2-wire conductor given current, length, cross-section, and conductor material. Resistivity is pulled from our materials database with source attribution.
Use ToolAC Power Calculator
Single-phase and three-phase AC power calculator. Solve for current, apparent power (kVA), or real power (kW) using voltage and power factor.
Use ToolTransformer Turns Ratio Solver
Given any three of primary voltage, secondary voltage, primary turns, and secondary turns, solve the fourth using the ideal transformer ratio.
Use ToolBattery Runtime Estimator
Estimate battery backup runtime from battery voltage, amp-hours, battery count, usable depth of discharge, inverter efficiency, and continuous load.
Use ToolBattery Runtime Calculator (Wh / Watts)
Simple Wh-based battery runtime: given a battery in watt-hours and a load in watts, compute how long it will run. Use for portable power stations (Jackery, EcoFlow, Anker) and spec-sheet sizing.
Use ToolDownload / Upload Time Calculator
Estimate how long a file transfer will take based on file size and connection speed. Handles mixed units β file size in MB/GB/TB, speed in Mbps/Gbps/MB-per-second.
Use ToolInternet Speed Needs Estimator
Estimate the minimum download + upload Mbps your household needs from concurrent streams, video calls, gaming, cloud backup, and smart-home devices.
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