Calculators
We're building out our library of calculators. Check back soon for tools in each category below.
Finance & Banking
View category →Mortgages, loans, compound interest, retirement, and other money calculators that help you plan, borrow, and grow with confidence.
Mortgage Calculator
Estimate your monthly PITI mortgage payment — principal, interest, taxes, insurance, PMI, and HOA — plus a full amortization schedule.
Loan Payment Calculator
Calculate your monthly loan payment, total interest, total cost, and a full amortization schedule for personal, auto, student, or business loans.
Compound Interest Calculator
Project compound growth on a starting balance with optional contributions — see your future balance, total interest, and a year-by-year schedule.
SIP Calculator
Project your mutual fund SIP maturity value from a monthly investment, expected return, and time — see total invested vs. wealth gained, with optional annual step-up.
Mortgage Affordability Calculator
Find out how much house you can afford using the 28/36 DTI rule — enter your income, debts, and down payment to see your maximum price, loan, and monthly payment.
Retirement Calculator
Project your retirement nest egg from current savings, monthly contributions, employer match, and expected return — see contributions, match, and growth over time.
Auto Loan Calculator
Estimate your monthly car payment from the vehicle price, down payment, trade-in, sales tax, and APR — see total interest, total cost, and a full amortization schedule.
ROI Calculator
Calculate the return on an investment from its initial and final value — see your net gain, total ROI, and annualized return (CAGR) over your holding period.
SIP Step-Up Calculator
Project your SIP maturity value with an annual step-up in your monthly investment — see total invested, wealth gained, and a year-by-year growth schedule.
Health & Fitness
View category →BMI, daily calorie needs, and other health metrics to help you understand your body and set realistic, healthy goals.
BMI Calculator
Calculate your body mass index (BMI), see your category on a WHO chart, and find your healthy weight range — metric or imperial.
Calorie Calculator
Estimate your daily calorie needs (BMR & TDEE) and get a goal-adjusted target to lose, maintain, or gain weight.
BMR Calculator
Estimate your basal metabolic rate with the Mifflin-St Jeor and Harris-Benedict formulas — see your BMR and daily calorie needs at every activity level.
One Rep Max Calculator
Estimate your one-rep max (1RM) from any weight and rep range using the Epley and Brzycki formulas, plus a training percentage chart for your lifts.
Macro Calculator
Find your daily protein, carb, and fat targets from your TDEE and goal — based on the Mifflin-St Jeor formula, with adjustable macro splits.
Mathematics
View category →Arithmetic, percentages, fractions, statistics, and everyday math made fast and foolproof.
Percentage Calculator
A 3-in-1 percentage tool: find a percent of a number, work out what percent one value is of another, and calculate percentage change — instantly.
Age Calculator
Find your exact age in years, months, and days from your date of birth, plus total weeks, days, and a countdown to your next birthday.
Fraction Calculator
Add, subtract, multiply, or divide two fractions or mixed numbers — see the exact simplified result, mixed-number form, and decimal equivalent, with steps shown.
Confidence Interval Calculator
Calculate a confidence interval for a sample mean or proportion — enter your sample size, mean or proportion, standard deviation, and confidence level.
Engineering
View category →Ohm's law, beam load, fluid dynamics, and other structural and electrical calculations for engineers and students.
Newton's Second Law Calculator
Solve F = ma for force, mass, or acceleration — supports N, kN, lbf for force; kg, g, lb for mass; m/s², g-force, ft/s² for acceleration. Shows weight equivalent.
Voltage Divider Calculator
Find output voltage, divider ratio, current, power dissipation, and Thevenin output impedance for a two-resistor voltage divider — Ω, kΩ, MΩ units supported.
Resistor Color Code Calculator
Decode any 4-band through-hole resistor by selecting colour bands — instantly read the nominal resistance, tolerance (±1% to ±10%), and min/max range. Includes colour reference table.
Motor Torque Calculator
Compute torque from force & lever arm (τ = F × d × sin θ) or from power & RPM, apply a gear ratio, and check it against your required torque with AI insights.
Power Calculator
Calculate electrical power from V & I (P=VI), V & R (P=V²/R), or I & R (P=I²R) — shows all four circuit quantities in watts, milliwatts, and kilowatts.
Beam Deflection Calculator
Estimate maximum beam deflection for common load cases (simply supported or cantilever, point or distributed loads) and check it against the L/360 serviceability limit.
Tax & Business
View category →Income tax, sales tax, payroll, margins, and other calculators for business owners and taxpayers.
Sales Tax Calculator
Add sales tax to a price or back it out of a tax-included total — enter any rate to see the tax amount, pre-tax price, and final total.
VAT Calculator
Add or remove VAT from a price — enter any rate to see the net amount, VAT charged, and gross total, with UK rate guidance built in.
GST Calculator
Add or remove GST from a price — enter any rate to see the GST-exclusive amount, GST charged, and GST-inclusive total, for India, Australia, and beyond.
Income Tax Calculator
Estimate your US federal income tax from your filing status and income — see your total tax owed, marginal and effective rates, and a bracket-by-bracket breakdown.
Take-Home Pay Calculator
Estimate your net paycheck from your gross salary — see federal tax, FICA, state tax, and 401(k) deductions, plus your annual, monthly, and bi-weekly take-home pay.
Hourly to Salary Calculator
Convert an hourly wage to an annual salary or back again — see your weekly, bi-weekly, monthly, and daily pay equivalents based on your hours and weeks worked.
Freelancer Tax Calculator (Pakistan)
Estimate income tax for Pakistani freelancers under FBR FY2024-25 slabs — compare resident vs. export-of-services rates and see your net take-home income.
Cash Flow Forecast Calculator
Project monthly cash inflows and outflows forward to see your running balance, spot the months you risk running short, and plan ahead with AI insights.
Science & Physics
View category →Velocity, force, energy, unit conversions, and other physics and chemistry calculators for the curious and the studious.
Ohm's Law Calculator
Solve V = IR for voltage, current, or resistance — and compute power (P = VI, I²R, V²/R) simultaneously. Supports SI prefix output (mA, kΩ, µW).
Speed Calculator
Solve speed = distance ÷ time for any unknown with km, m, mi, ft distance units and hours, minutes, seconds time units — plus a 4-unit speed conversion panel.
Kinetic Energy Calculator
Calculate KE = ½mv² from mass and velocity with metric or imperial units — results in J, kJ, and kWh, plus momentum (p = mv) as a bonus output.
Density Calculator
Solve ρ = m ÷ V for density, mass, or volume — supports kg, g, lb, oz for mass and m³, cm³/mL, litres, ft³ for volume with instant unit conversions.
Half-Life Calculator
Find remaining quantity, decayed amount, number of half-lives elapsed, and decay constant using N(t) = N₀ × (½)^(t/t½). Supports any time unit from seconds to years.