Online calculators
for everyday decisions.
Free online calculators for finance, currency, fitness, home improvement, dates and everyday math. Fast tools with no sign-up.
Categories
/ All calculatorsFinance
Loan, mortgage, compound interest, percentage and discount calculators for everyday money decisions.
Currency
Currency converter and popular pairs for quick travel, shopping and budget estimates.
Fitness
BMI, calories, running pace and one-rep max calculators for training and body metrics.
Home improvement
Tile, wallpaper, paint and laminate calculators for estimating materials before a project.
Date and time
Age and business day calculators for dates, planning and deadlines.
Maths calculators
Remainder, prime factors, proportions, equations and logarithms.
Business and marketing
Contribution margin, customer acquisition cost, average order value, returns and ad ROI.
Unit converters
Convert length, mass, temperature, pressure and other quantities between units.
Electronics calculators
Current, voltage, resistance, power and circuit supply.
Computer calculators
Download speed, bandwidth, frames, resolution and disk space.
Study calculators
Test percentages, the grade you need and reading speed.
Car calculators
Fuel consumption, power to weight, trip cost and speed.
Household calculators
Electricity use, tips and filling a pool.
Geometry calculators
Area, perimeter, volume and surface of flat and solid shapes.
Physics calculators
Force, energy, work, power and motion with stated units and models.
Chemistry calculators
Concentration, moles, dilution, pH and the ideal gas law.
New
All calculatorsSkirting board calculator
Skirting length around a room, less doorways, cut into planks.
Boiling point calculator
The boiling point of water at a given altitude above sea level.
NE555 astable timer calculator
Frequency, period and duty cycle of an NE555 multivibrator from two resistors and a capacitor.
Popular
All calculatorsCurrency converter
Convert amounts between common currencies for quick estimates.
Calorie calculator
Estimate daily calories and macronutrients from body data and activity.
Loan calculator
Estimate a monthly loan payment, total repayment and overpayment.
BMI calculator
Calculate body mass index from height and weight.
Mortgage calculator
Estimate mortgage payment, loan amount and overpayment.
Percentage calculator
Find a percentage, a share, an adjusted value or relative change with a clear comparison base.