All calculators

Estimate your monthly mortgage payment, total interest and payoff cost in seconds.

Work out monthly repayments, total interest and payoff totals for any loan.

See how savings grow with compounding and regular monthly contributions.

Find out how long it takes to reach a savings goal at your current pace.

Add or remove VAT at any rate and see the net, tax and gross amounts.

Calculate sales tax on any purchase and the final checkout total.

Convert an annual salary into monthly, weekly and hourly take-home pay.

Measure return on investment, net profit and annualised ROI for any project.

Calculate gross margin, markup and profit from cost and selling price.

Find how many units you must sell to cover fixed and variable costs.

Work out sale price, amount saved and effective discount instantly.

Calculate sales commission, base pay and total earnings.

Calculate body mass index with metric or imperial units and see your category.

Estimate basal metabolic rate and daily calorie needs by activity level.

Find your daily calorie target for losing, maintaining or gaining weight.

Estimate body fat percentage with the US Navy tape method.

Find your daily hydration target based on body weight and activity.

Estimate your due date and current pregnancy week from your last period.

Calculate maximum heart rate and personalised training zones.

Solve every common percentage problem: of, change, and what percent.

Calculate mean, median, mode, range and standard deviation of any dataset.

Add, subtract, multiply and divide fractions with simplified results.

Calculate the area and perimeter of rectangles, circles and triangles.

Estimate concrete volume, bags and cost for slabs, footings and pads.

Work out how many litres of paint your walls need, including coats.

Calculate tiles, boxes and cost for any floor or wall area.

Estimate flooring packs and cost from room dimensions.

Estimate gravel volume, tonnage and delivery cost for driveways and paths.

Solve for voltage, current, resistance and power from any two values.

Calculate the running cost of any appliance per day, month and year.

Convert between torque, force and lever arm length.

Calculate weighted grade point average from credits and grades.

Find your final grade and what you need on the remaining exam.

Calculate exact age in years, months, days, hours and next birthday.

Count days, weeks, months and working days between two dates.

Split the bill and calculate tips per person in a tap.

Estimate trip fuel consumption and cost from distance and efficiency.

Convert length, weight, volume and temperature between common units.

Convert Celsius, Fahrenheit and Kelvin instantly.

Solve for speed, distance or time with automatic unit conversion.

Convert between bytes, KB, MB, GB and TB in both decimal and binary.

Estimate how long a file takes to download at your connection speed.

Work backwards from a final amount to find the original value before a percentage change.

Convert absolute uncertainty into percentage uncertainty and combine uncertainties.

Compare two values with relative percent difference (RPD) and percent error.

Budget vs actual variance in currency and percentage terms, favourable or adverse.

Convert basis points to percent and back, and apply a bps change to a rate.

Turn hours worked into a percentage of a day, week, shift or full-time schedule.

Convert CGPA or GPA into a percentage using the standard multiplier or a custom scale.

Convert a percentage or CGPA into a 4.0-scale GPA for US applications.

Calculate attendance percentage and how many classes you can still miss.

Convert class rank into a percentile and top-percent figure for applications.

Work out food cost percentage, gross profit and the menu price you need.

Calculate labour cost as a percentage of revenue, including payroll burden.

Calculate overhead rate as a percentage of revenue, labour or direct cost.

Occupancy rate for hotels, rentals and venues, plus ADR and RevPAR.

Calculate a raise as a percentage, the new salary, and the real gain after inflation.

Equity ownership percentage, dilution after a raise, and value of your stake.

Retail inventory shrinkage or workforce shrinkage as a percentage, with loss value.

Track progress toward a target: percent to goal, gap remaining and run rate.

Mass percent of a component, including percent water in a hydrate.

Percent yield from actual and theoretical yield, with percent error.

Percentage weight loss from birth weight for newborns, with clinical thresholds.

Percentage of body weight lost, weekly rate and progress toward a goal weight.

Hitting percentage, kill percentage and efficiency from kills, errors and attempts.

Field goal, three-point, free-throw and effective/true shooting percentages.

Hockey and soccer save percentage, goals against average and shots faced.

Reading or listening progress as a percentage, plus time left at your speed.

Combine tint film VLT with factory glass to get the net light transmission.

Estimate ancestry percentages inherited from your parents and grandparents.

Find the exact end date of a 0, 10 or 90 day surgical global period from the date of surgery.

Calculate the 90 day global period end date for major surgery, including the pre-operative day.

Look up the global days assigned to a CPT code and get the exact global end date for your surgery.

Add or subtract any number of days from a date to get the exact calendar date.

Estimate the VAT refund you get back on tax-free shopping after processing fees.

Calculate your odds of winning a Risk attack from the number of attacking and defending armies.

Add up your raw Global History Regents score and see the percentage of the maximum you earned.

Calculate testicular volume in millilitres from ultrasound length, width and height using the Lambert or ellipsoid formula.

Calculate ovary volume in millilitres from ultrasound length, width and height using the prolate ellipsoid formula.

Work out the exact odds of a single Risk dice roll — how likely each side is to lose one or two armies with 3v2, 2v2, 3v1 and every other dice combination.