Category
Calculators.
Finance, health, math and science calculators, and the engineering simulators, with real-time, shareable results.
Compound Interest Calculate investment growth with compound interest and year-by-year breakdown. Tip Calculator Calculate tip amounts and split bills between any number of people. Discount Calculator Calculate sale prices, discounts, and savings from original and final prices. CTC Calculator Calculate Indian salary take-home pay with Old vs New tax regime comparison, EPF, HRA exemption and full salary slip. SIP Calculator Calculate returns on Systematic Investment Plans with year-by-year growth and wealth gain breakdown. EMI Calculator Calculate monthly EMI for home, car or personal loans with full amortization schedule. GST Calculator Calculate GST for any Indian tax rate — add or remove tax instantly with reverse calculation. Loan Calculator Work out the monthly payment on a mortgage, car or personal loan in your currency, the total interest, the amortization schedule and what extra payments save. Hourly to Salary Convert an hourly wage to a yearly salary, or a salary to an hourly rate, and see the same pay per day, week, fortnight and month.
BMI Calculate Body Mass Index, healthy weight range, BMI Prime and Ponderal Index. BMR & Calories Calculate Basal Metabolic Rate and daily calorie needs by activity level. Ideal Weight Find your ideal weight range using five established medical formulas. Pace Calculator Work out running pace, finish time or distance from the other two, per km or per mile, with even-pace splits from 5K to marathon. Body Fat Estimate body fat percentage using the US Navy measurement method.
Percentage Calculate percentages, percentage of a value, and percentage change. Age Calculator Calculate exact age in years, months, weeks, days and hours from any birth date. Date Difference Calculate the exact number of days, weeks, months and years between two dates. Hours Calculator Work out the hours between two times less a break, overnight shifts included, and total a weekly timesheet in decimal hours. Average Calculator Find the mean, median, mode, range and standard deviation of a list of numbers, or a weighted average. Fraction Calculator Add, subtract, multiply and divide fractions and mixed numbers with the working shown, and convert decimals to fractions.
Dew Point Calculate dew point, absolute humidity, wet-bulb temperature and vapor pressure. Heat Index Calculate the apparent feels-like temperature in hot and humid conditions. Wind Chill Calculate the perceived temperature in cold and windy conditions. Humidity Convert between relative, absolute and specific humidity and dew point. Altitude & Pressure Convert between altitude and atmospheric pressure using the ISA model.
IC Engine Simulator See how a four-stroke engine works in 3D — TDC to BDC, valve timing, firing order and the Otto cycle, with live pistons, crankshaft and camshafts. Turbocharger Simulator A live 3D turbocharger on a real physics model — spool it up and watch turbo lag, hold boost with the wastegate, cross a compressor map, and make it surge on a lift-off. Thermodynamic Cycles Simulator Run the Otto, Diesel, Dual, Brayton, Rankine, Carnot, Stirling, Ericsson and Atkinson cycles on one 3D machine beside a live P–v and T–s diagram — thermal efficiency against the Carnot limit, net work, heat in and out, back work ratio and mean effective pressure, with every state point written out. Refrigeration Cycle Simulator Watch a vapour-compression cycle run as a machine and as a pressure-enthalpy chart at the same time — COP, refrigerating effect, compressor work, discharge temperature and quality, across six refrigerants, in cooling or heat-pump mode. Heat Exchanger Simulator A shell-and-tube heat exchanger and its temperature profile on one shared axis — drag a cursor along the length to read the local driving difference, and get LMTD, NTU, effectiveness and duty for counter, parallel and cross flow, with condensing and boiling streams. Heat Transfer Calculator Conduction, convection and radiation on one instrument — with the convection coefficient h computed from real Nusselt correlations instead of typed in, and every mode shown as a thermal resistance so Q = ΔT/R holds in all three. Psychrometric Chart Read every property of moist air off an interactive chart — drag a state point for dry-bulb, wet-bulb, dew point, relative humidity, humidity ratio, enthalpy and specific volume, corrected for altitude, in SI or IP. Collision & Momentum Simulator Crash gliders on a 3D air track, scatter pucks across an air table, fire a ballistic pendulum, run a Newton’s cradle or drive a car into a barrier — with a live conservation ledger for momentum and kinetic energy, elastic through perfectly inelastic, in SI or imperial. Vernier Caliper Simulator Drag a working vernier caliper and read it at 0.02, 0.05 or 0.1 mm least count — or switch to a 0.001 in inch caliper — with the main-scale and vernier arithmetic written out, zero error you can set and see, and practice and quiz modes. Resistor Color Code Calculator Decode any 3, 4, 5 or 6-band resistor — click the bands on a photoreal 3D part or drive them from the keyboard, and read resistance, tolerance, the true range, temperature coefficient and the E-series value it belongs to, with the arithmetic written out and a warning when the combination is one no manufacturer ships.