All calculators
Search by name or filter by category to find exactly the tool you need. New calculators are added regularly.
Calculate a percentage of any value or test increase and decrease scenarios.
Measure age between two dates with a clean, readable breakdown.
Estimate reduced price, savings, and tax impact in one panel.
Add VAT to a net amount or remove it from a gross total.
Estimate body mass index from weight and height inputs.
Compare two dates and show both total days and calendar breakdown.
Estimate monthly repayments, total payment, and interest paid.
Forecast compounded growth with optional monthly contributions.
Translate annual salary into estimated hourly earnings.
Every calculator on Qepto Tools runs instantly in your browser — no account, no download, no waiting. Pick a category below to learn what each section covers.
Our finance tools cover the full range of personal and business money decisions. Calculate monthly mortgage payments or total interest on a loan, see how compound interest grows savings over time, work out ROI on an investment, or find out how long it takes to pay off a credit card. The VAT, discount, percentage, and tip calculators handle the quick everyday arithmetic that comes up at work and at the checkout.
Health tools give you objective numbers without a clinic visit. The BMI and ideal weight calculators use your height and weight to give you a range, while the body fat calculator uses tape measurements for a more detailed picture. Calorie needs and protein intake calculators factor in your activity level and goals, and the heart rate zone calculator maps out the right training intensities for cardio and endurance work.
Date tools turn calendar arithmetic into a one-second lookup. The date difference calculator counts exact days, weeks, or months between two dates — handy for contracts, deadlines, or anniversaries. The age calculator gives a precise age down to the day. The workdays calculator skips weekends for business scheduling, the countdown timer tracks days to any event, and the time zone converter aligns meetings across continents.
Lifestyle tools handle the practical household and study calculations that come up regularly. The square footage and paint calculators save a trip to the hardware store for a wrong amount of supplies. The electricity cost calculator shows what an appliance adds to your bill each month. The GPA calculator tracks academic standing, the sleep calculator finds the best bedtime for a full sleep cycle, and the water intake calculator estimates daily hydration needs by body weight and activity.
Travel tools help you plan and budget before you leave. The fuel cost and gas mileage calculators estimate what a road trip will cost at current prices. The travel time calculator converts distance and speed into hours and minutes. The currency converter gives a quick exchange rate check, the carbon footprint calculator estimates CO₂ emissions from driving, and the inflation calculator shows how purchasing power changes over years in different economic conditions.
