New Calculators

Enter the amount, the rate and the term to see the payment, the interest it costs, and how the split between interest and principal changes across the schedule.

Monthly payment and total interest on an ATV, UTV or side-by-side loan, where short terms and powersport rates add up faster than buyers expect.

Enter the loan, the rate, the amortization period and the year the loan falls due to see the instalment and the lump sum waiting at the end.

Enter the price, the deposit, the rate and the term to see what a boat costs each month — and what a 15- or 20-year marine term costs in interest.

Enter your body, your goal weight and how big a deficit you want. You get the daily intake, the weekly rate of loss and the week the goal arrives.

Enter a salary and the pay band it sits in. You get the compa-ratio, the range penetration, and where both place you against the market rate.

Enter the property's net operating income and the loan you want, and see the coverage ratio a lender will underwrite against.

Turn a decimal into its simplest fraction, or a fraction into a decimal, in either direction.

Enter two fractions and an operation. You get the answer in lowest terms, as a mixed number and as a decimal.

Enter a grade on any of four scales and see it on all of them: US 4.0 GPA, percentage, 10-point CGPA and the German 1-6 grade.

Enter a raw score and pick a curve. You get the curved percentage, the points gained, and what all four common curves would do to the same score.

See both HELOC payments at once — the interest-only payment while you draw, and the fully amortizing payment that replaces it.

Weighted and unweighted high-school GPA side by side on the US 4.0 scale, so you can see exactly what honors and AP coursework adds.

Find out how much a lender will actually release against your home, and what the payment on it would be.

Enter your height and sex to see what the four standard ideal-body-weight formulas suggest — and how they compare with the healthy BMI range.

Enter the amount, the rate and the term to see your monthly payment, what the loan costs in interest, and how much an extra payment each month would save.

Enter your body, your activity and your goal to get a daily calorie target split into grams of protein, fat and carbohydrate.

Monthly payment and total interest on a manufactured or mobile home loan, including what the chattel-versus-real-property split does to the numbers.

Enter the price, the deposit, the rate and the term to see the full monthly housing payment — principal, interest, property tax and insurance in one figure.

Enter a set you actually completed and pick an equation to estimate the most you could lift once — plus the loads that estimate implies for training.

Convert a point between polar and rectangular coordinates in either direction, in degrees or radians.

Enter the price, the deposit, the rate and the term to see what a motorhome or caravan costs each month — and what the long term costs in interest.

Enter your chest, waist and height to get the jacket number, the length letter, the EU size and the trouser waist that comes with them.

Enter your age and, if you know it, your resting pulse. You get the beats per minute your chosen training zone actually means.

Enter your sex, age, weight, height and activity level to see the calories you burn in a day — and what to eat to lose, hold or gain weight.

Free AP Chemistry score calculator. Turn your multiple-choice and free-response raw scores into a predicted 1-5 AP score on the 150-point composite scale.

Free AP Psychology score calculator for the redesigned exam. Turn your multiple-choice count and your AAQ and EBQ rubric scores into a predicted 1-5 AP score.

Free AP Statistics score calculator. Turn your multiple-choice count, your five free-response scores and the investigative task into a predicted 1-5 AP score.

Free AP US Government score calculator. Turn your multiple-choice count and the four free-response rubric scores into a predicted 1-5 AP score.

Work out which ceiling fan blade span suits your room, and the airflow rating to look for when you compare models.

Work out how much a glass pane weighs from its length, width, thickness and material. Handy before you lift it, hang it, or ask two people to carry it.

Estimate the heat output a heat pump needs to deliver for your home, including the allowance for hot water.

Convert milligrams to millilitres and back. Milligrams measure mass and millilitres measure volume, so you need the concentration — and this asks for it.

Work out the weight of any straight pipe run from its outside diameter, wall thickness, length and material. Metric and imperial, seven materials.

Convert pixels to inches, centimetres, millimetres or points at any DPI — and back. Free, instant, and it shows the pixel density the answer depends on.

Work out the flow rate your pool pump has to sustain to turn the water over in the time you want.

Work out what a run of reinforcing bar weighs — for a bar schedule, a delivery note or a lift.

Find the largest standard rug that fits your room while leaving an even border of bare floor.

Convert square feet to linear feet, or square metres to running metres. Enter the area and the material width — the width is what makes the conversion possible.

Convert seconds, minutes, hours, days, weeks, months and years. Free and instant — and it tells you which year length the answer assumes.

Calculate a certificate of deposit's value at maturity, interest earned, and APY — from an advertised APY or a nominal rate with compounding.

Convert a z, t, chi-square, or F test statistic into its exact p-value and check significance at your alpha level.

Convert a raw score or a z-score into a T-score on the 50 ± 10 metric and see the matching percentile.

Find how many steps the Collatz sequence takes from any positive integer to 1 — halving even numbers and applying 3n + 1 to odd ones — plus the highest value reached along the way.

Calculate the number of combinations with repetition C(n + r − 1, r) — how many ways to choose r items from n distinct types when repeats are allowed and order does not matter.

Convert a power level in dBW to watts and dBm instantly — essential for radar, satellite, and broadcast engineers working with transmitter power and link budgets.

Find how many positive divisors a number has and what they add up to — useful for number theory, identifying prime numbers, and checking whether a number is perfect or abundant.

Convert foot-candles to lux instantly — enter an illuminance reading in foot-candles (lm/ft²) and get the equivalent in lux (lm/m²), the SI unit used in international lighting standards and photometry.

Convert kVA to kW instantly — enter apparent power and power factor to get real power in kilowatts and reactive power in kVAR using the power triangle formula.

Convert kilowatts to kilovolt-amperes instantly by entering your real power and power factor — essential for sizing generators, transformers, and UPS systems correctly.