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Home/Science & engineering

LEARNING & SCIENCE

Science and engineering calculators

Browse planned science and engineering calculators for formulas, physical quantities and technical measurements. Explore the units and variables required.

42 tools to exploreCHOOSE YOUR STARTING POINT

Distance between coordinates calculatorDistance calculator: calculate Great Circle as-the-crow-flies distance between GPS coordinates (lat/long) or 2D/3D points.Electrical cable sizing calculatorCalculate required electrical conductor size, current capacity, and permissible circuit run lengths compliant with IEC and BS standards.Molar concentration calculatorMolarity calculator: calculate solution molarity, moles, and required mass of solute from molecular weight and volume.Speed distance time calculatorSpeed calculator: solve speed, distance, time, and running pace in km/h, mph, m/s, or knots using the formula v = d / t.Solution dilution calculatorDilution calculator: solve C1V1 = C2V2 to find how much stock solution to measure and diluent to add for your target concentration.Slope, pitch & grade calculatorSlope calculator: calculate slope (m = rise/run), incline angle in degrees, percentage grade (%), and roof pitch.Cable voltage drop & wire loss calculatorVoltage drop calculator: calculate cable voltage drop, load voltage, percentage loss, and maximum circuit run lengths for single and 3-phase circuits.Ohm's law & power wheel calculatorOhm's law calculator: solve for voltage, current, resistance, and electrical power using V = I × R and P = V × I.US city & coordinate distance calculatorUS distance calculator: find the straight-line great circle distance between US cities and coordinates in statute miles, feet, and nautical miles.US NEC wire voltage drop calculatorUS voltage drop calculator: calculate wire voltage drop in feet and AWG circular mils according to NEC 210.19(A) 3% and 5% guidelines.Electrical power & energy calculatorPower calculator: calculate AC single-phase, three-phase, and DC electrical power (Watts, kW, kVA, kVAR) and kWh energy consumption.UK crow-flies distance calculatorUK distance calculator: calculate straight-line as-the-crow-flies distance between UK towns and coordinates in miles and yards.UK BS 7671 voltage drop calculatorUK voltage drop calculator: verify cable compliance with BS 7671 18th Edition limits (3% lighting and 5% power) using mV/A/m tables.US NEC wire size & ampacity calculatorDetermine required AWG conductor size and ampacity for 120V/240V circuits compliant with the National Electrical Code (NEC).US highway speed & travel time calculatorUS speed calculator: calculate driving speed in mph, highway distance in miles, and travel duration using US customary units.US roof pitch & slope calculatorUS slope calculator: calculate roof pitch in inches per foot (X/12 pitch), percentage slope (grade %), and ADA ramp requirements.Density, mass & volume calculatorDensity calculator: calculate density (ρ = m/V), mass, or volume across metric and imperial units with reference material densities.Series, parallel & LED resistor calculatorResistor calculator: calculate equivalent resistance for series and parallel networks, and size LED current limiting dropper resistors.UK road speed & journey time calculatorUK speed calculator: work out average road speed in mph, trip distance in miles, and journey duration according to British road standards.UK BS 7671 cable sizing calculatorCalculate UK cable sizes for domestic and commercial installations compliant with BS 7671 18th Edition wiring regulations.Solution concentration calculatorConcentration calculator: convert and calculate solution concentration in g/L, mg/mL, percentage strength (% w/v, % w/w), and PPM/PPB.Camshaft LSA & overlap calculatorCalculate camshaft Lobe Separation Angle (LSA), valve overlap, intake centerline, and exhaust centerline for performance engine builds.Mechanical work & energy calculatorWork calculator: calculate mechanical work done (W = F·d·cos θ), mechanical power in Watts and horsepower, and kinetic or potential energy.Potential divider output calculatorVoltage divider calculator: calculate output voltage (Vout) for loaded and unloaded resistor dividers, circuit current, and power dissipation.UK gradient & road incline calculatorUK slope calculator: calculate British 1 in X gradient ratios, road incline percentage grades, and ramp slopes for UK Part M standards.US 120V / 240V / 480V electric power calculatorUS power calculator: calculate Watts, kW, kVA, and continuous loads under NEC 80% rules for US 120V, 240V, and 480V circuits.AISC W-Beam deflection & load calculatorCalculate US AISC Wide Flange (W-shape) beam deflection, section modulus, and maximum load capacity in feet and kips.Steel beam deflection & stress calculatorCalculate simply supported steel beam deflection, bending stress, and maximum permissible span under uniform distributed and point loads.Molar mass & chemical formula calculatorMolecular weight calculator: enter any chemical formula to calculate molar mass, formula weight, and elemental mass percentage breakdown.UK 230V / 400V electrical power calculatorUK power calculator: calculate real power (kW), apparent power (kVA), and electricity units (kWh) for UK 230V and 400V 50Hz installations.UK Universal Beam (UB) deflection calculatorCalculate UK Universal Beam (UB) deflection and bending moment for residential structural steelwork according to BS 4-1.US radius distance & coverage calculatorCalculate map radius distance in miles, service area coverage in square miles, and travel radius circles across the United States.BS 5839 fire alarm standby battery calculatorUK fire alarm battery calculator: calculate the standby battery capacity (Ah) for fire alarm panels according to BS 5839-1:2017 Section 25.4.Optics & telescope magnification calculatorCalculate optical magnification, focal lengths, aperture focal ratios, and field of view for telescopes, microscopes, and thin lenses.Geographic radius & coverage calculatorCalculate geographic radius circles, land coverage area, circumference, and driving radius around any location on a map.HDPE pipe pressure rating & DR calculatorCalculate HDPE pipe working pressure rating, minimum wall thickness, inside diameter, and flow velocity compliant with PPI and AWWA standards.Saturated steam tables & thermodynamic calculatorCalculate saturated steam temperature, pressure, specific volume, enthalpy, and latent heat of vaporisation based on IAPWS-IF97 formulations.UK radius distance & area calculatorCalculate radius circles in miles around UK towns and cities, coverage areas in square miles and acres, and travel boundaries.US PPI TR-33 HDPE pipe calculatorCalculate US HDPE pipe pressure classes, DR wall thickness, thermal expansion, and AWWA C906 ratings using PPI TR-33 guidelines.Bullet trajectory & drop calculatorCalculate bullet trajectory, bullet drop in inches and MOA/MILs, velocity decay, time of flight, and wind drift using G1/G7 drag functions.NFPA 72 secondary power battery calculatorUS fire alarm battery calculator: determine secondary power battery capacity (Ah) for commercial fire alarm units under NFPA 72 Chapter 10.UK PE100 HDPE pipe pressure & SDR calculatorCalculate UK PE100 and PE80 HDPE pipe pressure rating, SDR wall thickness and flow velocity in bar and mm to ISO 4427 and BS EN 12201.

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