All Calculators
Every one of the 18 tools on the site, grouped by what they do. All free, no sign-up.
Loan & EMI Calculator
Monthly payment, total interest, and a full amortization schedule.
OpenMortgage Calculator
Full monthly cost including tax, insurance, and PMI.
OpenCompound Interest Calculator
See how savings grow with regular contributions.
OpenSIP Calculator
Project returns on a monthly investment plan.
OpenDiscount Calculator
Final price after one or two discounts, plus tax.
OpenTip Calculator
Tip amount and per-person split, rounded cleanly.
OpenBMI Calculator
Body mass index with category and healthy weight range.
OpenCalorie & BMR Calculator
Daily calorie needs for losing, holding, or gaining weight.
OpenBody Fat Calculator
Body fat percentage from tape measurements.
OpenIdeal Weight Calculator
Target weight from four clinical formulas plus BMI range.
OpenPregnancy Due Date Calculator
Due date, current week, and trimester milestones.
OpenWater Intake Calculator
Daily hydration target adjusted for exercise and climate.
OpenPercentage Calculator
Every common percentage question in one place.
OpenAge Calculator
Exact age in years, months, days, and total units.
OpenDate Difference Calculator
Days between two dates, with or without weekends.
OpenGPA Calculator
Weighted GPA from course grades and credit hours.
OpenFraction Calculator
Add, subtract, multiply, and divide fractions.
OpenAverage Calculator
Mean, median, mode, range, and standard deviation.
Open