287+ free calculators · interactive charts · 3D math
Calculators that feel like a modern product — not a dusty directory.
Finance charts, SIP growth, amortization curves, and showcase 3D math — accurate, mobile-first, and fast. Search with ⌘K / Ctrl+K.
Interactive charts
Amortization, SIP, trajectories, and more via Recharts.
Showcase 3D
Surface plots, Pythagoras space diagonal, spheres & growth bars.
287+ tools
Finance, math, health, construction, science — all working.
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Featured
Try 3D math →Mortgage Calculator
Estimate monthly principal & interest payments for a fixed-rate mortgage.
💰 FinanceCompound Interest Calculator
See how money grows with compound interest over time.
💰 FinanceROI Calculator
Measure return on investment as gain and percentage.
💰 FinanceRetirement Nest Egg (Simple)
Project retirement savings with regular monthly contributions.
💰 FinanceCompounding Calculator
Compare continuous vs n-times-per-year compounding, effective annual rate, and a year-by-year growth schedule.
💰 FinanceSIP / Recurring Investment
Project future value of a monthly SIP / recurring investment.
∑ MathScientific Calculator
Common scientific operations: sin, cos, tan, log, ln, sqrt, and more.
∑ MathQuadratic Equation Solver
Solve ax² + bx + c = 0 for real roots.
∑ MathPythagoras Theorem Calculator
Find the hypotenuse or a leg of a right triangle; optional 3D space diagonal.
Popular
Mortgage Calculator
Estimate monthly principal & interest payments for a fixed-rate mortgage.
💰 FinanceLoan / EMI Calculator
Calculate equated monthly installment (EMI) for personal or auto loans.
💰 FinanceCompound Interest Calculator
See how money grows with compound interest over time.
💰 FinancePercentage Calculator
Quick percentage of a number — useful for tips, discounts, and taxes.
💰 FinanceTip Calculator
Calculate tip amount and per-person split for dining out.
💰 FinanceDiscount Calculator
Find the sale price and savings from a percent-off discount.
💰 FinanceCompounding Calculator
Compare continuous vs n-times-per-year compounding, effective annual rate, and a year-by-year growth schedule.
💰 FinanceSIP / Recurring Investment
Project future value of a monthly SIP / recurring investment.
💰 FinanceCAGR Calculator
Compound annual growth rate between a beginning and ending value.
∑ MathBasic Calculator
Add, subtract, multiply, and divide two numbers.
∑ MathScientific Calculator
Common scientific operations: sin, cos, tan, log, ln, sqrt, and more.
∑ MathAverage / Mean / Median / Mode
Compute mean, median, and mode from a list of numbers.