Free, accurate, browser-based calculators for finance (EMI, SIP, compound interest, ROI), health (BMI, body fat, TDEE, calories, macros), construction (concrete, stairs, lumber), education (GPA, weighted GPA), and everyday math. No signups, no ads on inputs, 100% private.
Full scientific calculator with trigonometric, logarithm, exponential functions.
Launch ToolCalculate Equated Monthly Installments with amortization schedule.
Launch ToolCalculate Systematic Investment Plan returns with inflation adjustment.
Launch ToolAdvanced compound interest with inflation adjustment, capital gains tax, step-up SIP, year-by-year breakdown. Supports 20+ world currencies.
Launch ToolCalculate percentage of a number, percentage increase/decrease.
Launch ToolCalculate cubic yards, bag counts, and cost for concrete slabs, footings, and columns.
Launch ToolCalculate stair rise, run, stringer length, and tread count with IBC code compliance.
Launch ToolCalculate lumber in board feet, linear feet, cubic meters, and cost for hardwood and softwood.
Launch ToolCalculate inflation-adjusted value of money from 1913 to today using official BLS CPI data.
Launch ToolCalculate total hours worked per week with overtime pay support. Perfect for hourly employees, freelancers, and small business owners. Tracks regular vs overtime hours automatically. 100% private.
Launch ToolCalculate your weighted GPA with support for AP, Honors, IB, and dual-enrollment courses. Supports 4.0, 4.5, 5.0, and 100-point scales. Add unlimited courses. 100% private.
Launch ToolCalculate business days between two dates with US holidays. Perfect for project deadlines, contract dates, and HR planning. Excludes weekends and federal holidays. Free.
Launch ToolCalculate ideal body weight using 7 medical formulas (Devine, Hamwi, BMI-Based, Broca, Robinson, Miller). Shows range based on frame size. Free.
Launch ToolConvert between annual, monthly, bi-weekly, weekly, daily and hourly pay. Calculate overtime rates and after-tax take-home pay. Free.
Launch ToolCalculate your Zakat on cash, gold, silver, stocks, crypto, and business assets with live Nisab thresholds and deduction breakdown.
Launch ToolFrom the loan you are about to take to the calories you should eat, the right calculator turns guesswork into a number you can act on. This hub groups them by domain so you can jump straight to what you need, whether that is the EMI on a home loan or the macros for a cut.
Finance: loan EMI, SIP, compound interest, ROI, margin, profit, break-even, GST, sales tax, tip, salary-to-hourly, time card, inflation. Health & fitness: BMI, body fat, calorie, macro, TDEE, heart rate, sleep, water intake, one-rep max, pace, ideal weight, ovulation, pregnancy due date. Construction & DIY: concrete, stairs, lumber. Education: GPA, weighted GPA. Everyday math: percentage, age, date, date difference, working days, scientific calculator, unit converter.
Each calculator uses peer-reviewed or standard formulas — Mifflin-St Jeor for TDEE, the Epley/Brzycki/Lombardi equations for one-rep max, Karvonen for heart-rate zones, BLS CPI data for inflation — and shows the inputs behind the result so you can verify the math instead of trusting a black box. Results update live as you type, and every calculation runs in your browser with no signup and no upload.
Every calculation runs locally on your device. Your income, weight, and dates are never uploaded.
Finance, health, construction, education, and everyday calculators — no subscriptions, no daily limits, no signups.
Results update live as you type — no page reloads, no server round-trips, no waiting.