Finance, Health, Math & Construction Calculators
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.
Explore the Calculators
Scientific Calculator
Full scientific calculator with trigonometric, logarithm, exponential functions.
Launch ToolCompound Interest Calculator
Advanced compound interest with inflation adjustment, capital gains tax, step-up SIP, year-by-year breakdown. Supports 20+ world currencies.
Launch ToolConcrete Calculator
Calculate cubic yards, bag counts, and cost for concrete slabs, footings, and columns.
Launch ToolStair Calculator
Calculate stair rise, run, stringer length, and tread count with IBC code compliance.
Launch ToolLumber Calculator
Calculate lumber in board feet, linear feet, cubic meters, and cost for hardwood and softwood.
Launch ToolInflation Calculator
Calculate inflation-adjusted value of money from 1913 to today using official BLS CPI data.
Launch ToolTime Card Calculator
Calculate 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 ToolWeighted GPA Calculator
Calculate 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 ToolWorking Days Calculator
Calculate business days between two dates with US holidays. Perfect for project deadlines, contract dates, and HR planning. Excludes weekends and federal holidays. Free.
Launch ToolIdeal Weight Calculator
Calculate ideal body weight using 7 medical formulas (Devine, Hamwi, BMI-Based, Broca, Robinson, Miller). Shows range based on frame size. Free.
Launch ToolSalary to Hourly Calculator
Convert between annual, monthly, bi-weekly, weekly, daily and hourly pay. Calculate overtime rates and after-tax take-home pay. Free.
Launch ToolFree Zakat Calculator
Calculate your Zakat on cash, gold, silver, stocks, crypto, and business assets with live Nisab thresholds and deduction breakdown.
Launch ToolA Calculator for Every Decision
From 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.
Key Advantages of ToolWise Calculators
- Transparent Formulas: Each calculator exposes its formula, so you can see exactly how the number was derived instead of trusting a black box.
- Absolute Privacy: Your income, weight, and cycle dates are processed on your device — never uploaded to a server that tracks them.
- Live Results: Numbers update as you type — no submit button, no page reload, no server round-trip.
- Zero Cost Barriers: Finance, health, construction, and education calculators are all free forever, with no daily usage limits.
Frequently Asked Questions
Are financial calculators accurate for real-world planning?
Yes. Our Compound Interest, Loan EMI, SIP, Profit Margin, and ROI calculators utilize standard banking financial formulas (including compound compounding frequencies and amortization schedules) for exact projections.
Can I calculate loans with prepayment or variable interest?
Our Loan EMI Calculator supports standard amortized monthly payments, showing a complete breakdown of total interest payable versus principal balance over the loan tenure.
Can I export or print my calculation results?
Yes. Results display clear graphical tables, visual summaries, and allow one-click copying or saving for financial reports and budget spreadsheets.
Do the math and percentage calculators support complex formulas?
Yes. We provide scientific calculators, percentage increase/decrease tools, fraction calculators, and ratio solvers for engineering, academic, and business needs.
100% Private
Every calculation runs locally on your device. Your income, weight, and dates are never uploaded.
Always Free
Finance, health, construction, education, and everyday calculators — no subscriptions, no daily limits, no signups.
Instant Results
Results update live as you type — no page reloads, no server round-trips, no waiting.