Science
34 tools available
Ohm's Law Solver
Given any two of voltage (V), current (A), and resistance (Ω), solve for the third. Also returns power (P = V × 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.). Includes an interactive draggable visualizer.
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 = ρ·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 — 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.
Use ToolProjector Throw Distance Calculator
Given a projector throw ratio (from the manufacturer spec sheet) and the target image width, compute the front-lens-to-screen distance. Supports a ratio range (min/max) when the projector has zoom.
Use ToolDisplay Size & Viewing Distance Planner
Given a display diagonal and aspect ratio, returns the SMPTE-recommended (30° FOV) and THX-recommended (36° FOV) viewing distances. Use these as the bounds for conference-room, classroom, or home-theatre seating design.
Use ToolAudio Delay Alignment Calculator
Given the physical distance between a main loudspeaker and a delay/fill speaker, computes the DSP delay needed to time-align them at the audience. Temperature-corrects the speed of sound when provided.
Use ToolSpeaker Coverage Spacing Calculator
For ceiling-speaker installations, computes the per-speaker coverage radius at listener ear height and the grid spacing needed for uniform coverage. Uses the manufacturer's specified coverage angle.
Use ToolRT60 Reverberation Estimator (Sabine)
Estimates reverberation time (RT60) for a room using the Sabine formula given room volume and total absorption. Accept either matched surfaces/coefficients arrays or a single total-absorption number.
Use ToolPoE Budget Calculator
Checks whether the active PoE endpoints on a switch fit within the switch's total PoE budget, accounting for IEEE 802.3af/at/bt class reservations and estimated cable loss.
Use ToolFiber Optic Loss Budget Calculator
Total optical link loss from fiber attenuation, connectors, and splices. Compared against a user-supplied link budget (Tx power − Rx sensitivity from the transceiver spec) to tell you whether the link is feasible.
Use ToolRack Power + Thermal Planner
Given equipment wattages in a rack, computes total planned load (with overhead), heat load in BTU/hr, AC cooling tonnage, and branch current at a given voltage / phase.
Use ToolPower Law Solver (P/V/I/R)
Solve for any of power, voltage, current, or resistance given any two of the others. Combines P = V·I, P = I²·R, P = V²/R, and Ohm's law.
Use ToolVoltage Divider Calculator
Solve for any of Vin, Vout, R1, or R2 in an unloaded voltage divider. Standard formula Vout = Vin × R2 / (R1 + R2).
Use ToolRight Triangle Solver
Solve for any unknown sides or non-right angles of a right triangle given any two values. Uses the Pythagorean theorem and SOH-CAH-TOA. Includes an interactive draggable visualizer.
Use ToolFluid Pressure at Depth
Hydrostatic pressure at a given depth in a fluid. Solve for pressure, depth, or density. Density auto-resolves from a curated fluid library (water, seawater, mercury, oil, air) or accepts a custom value.
Use ToolEscape Velocity Calculator
Compute the escape velocity from any astronomical body, or solve for the body's mass or radius from a known escape velocity. Default body data comes from NASA fact sheets (Earth, Moon, Mars, Sun); supports custom bodies via mass + radius.
Use ToolOrbital Period Calculator
Kepler's Third Law solver: given a central body and a semi-major axis, compute the orbital period. Or solve for any of period / semi-major axis / central mass. NASA / IAU body data populated automatically.
Use ToolSurface Gravity Calculator
Compute the surface gravity of any body: g = GM/r². Companion to the escape-velocity calculator. Solve for g, mass, or radius. NASA / IAU body data populated automatically.
Use ToolHeat Capacity & Temperature Rise
Compute the heat energy needed to raise (or lower) a material's temperature: Q = m·c·ΔT. Specific-heat lookup from a curated material table (water, seawater, oil, mercury, air, steel, aluminum, copper, concrete, glass, wood, ice).
Use ToolWork / Energy / Power Solver
Multi-mode mechanics solver for kinetic energy (½mv²), potential energy (mgh), work (F·d·cosθ), and power (W/t). Pick the relationship, leave one variable blank, fill the rest.
Use ToolProjectile Motion Solver (2D, no drag)
Two-dimensional projectile motion: given launch speed, angle, and height, compute time of flight, horizontal range, max height, and impact speed. Reverse mode solves for the launch angle that hits a given range.
Use ToolArc Length & Sector Area Solver
Given any TWO of {radius, central angle, arc length, sector area}, solve for the others. Also reports chord length and segment area. Includes an interactive draggable visualizer.
Use ToolCylinder / Sphere / Cone Solver
3D-primitive solver: pick the shape (cylinder / sphere / cone), pick the unknown (volume / surface area / radius / height), fill the rest. Reports lateral area + slant height where applicable.
Use ToolTriangle Solver (Full)
Solve any triangle given any three of {a, b, c, A, B, C} including SSS, SAS, ASA, AAS, and the ambiguous SSA case. Reports both solutions when SSA admits two valid triangles. Distinct from the right-triangle-solver (which assumes a 90° angle).
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