Plan a loan or investment decision
Start with the EMI calculator to understand monthly repayment obligations, then check compound interest to compare investment growth, and finally calculate ROI to evaluate if the return justifies the cost.
Free Online Calculators – Finance, Health, Math & More
Free online calculators for math, finance, health, education, and everyday decisions.
ToolMint's calculators cover the decisions you face regularly: working out EMI on a loan, finding how many calories you need to lose weight, calculating GST on an invoice, converting CGPA to a percentage, or checking if a business idea is worth pursuing. Each calculator is paired with enough context to help you understand the output, not just read a number.
All calculators run instantly in your browser — no account, no signup, no waiting.
Scientific Calculator
Full scientific calculator with sin, cos, tan, log, ln, square roots, and exponents — works in degrees and radians.
Percentage Calculator
Find X% of Y, calculate percentage increase or decrease, and convert marks to percentage.
Age Calculator
Calculate exact age in years, months, and days from any date of birth — useful for exam eligibility and government schemes.
BMI Calculator
Calculate Body Mass Index and see your healthy weight range based on height and weight.
Loan EMI Calculator
Calculate monthly EMI, total interest, and full amortization schedule for any home, car, or personal loan.
Compound Interest Calculator
See how money grows with compound interest over time — compare FD, PPF, and investment returns.
Profit Margin Calculator
Calculate gross margin, net margin, and selling price from cost — with markup vs margin explained.
ROI Calculator
Calculate return on investment percentage, net profit, annualized return, and payback period.
GST Calculator
Add GST to a price or remove GST from an inclusive amount. Covers all Indian GST slabs (5%, 12%, 18%, 28%).
Break-even Calculator
Find how many units to sell or how much revenue to generate to cover all costs and break even.
GPA Calculator
Calculate semester GPA, cumulative CGPA, and convert CGPA to percentage on India's 10-point scale.
Work Hours Calculator
Calculate total work hours across shifts, deduct break times, compute overtime, and estimate total pay.
Calorie Calculator
Find your daily calorie needs (BMR and TDEE) based on age, weight, height, and activity level for weight loss or gain.
Tip Calculator
Calculate tip amount and split the total bill equally between any number of people.
Palworld Breeding Calculator
Select any two parent Pals to instantly find the child Pal — covers all breeding combinations including rare and legendary Pals.
Popular Workflow Paths
Check business viability
Calculate GST on your pricing, find your profit margin, then run a break-even analysis to see the minimum sales volume your business needs.
Track academic progress
Calculate your semester GPA, convert your CGPA to percentage using the standard Indian formula, and use the scientific calculator for exam practice.
What You Can Do In This Category
Finance and Business
Calculate loan EMI, compound interest, profit margin, ROI, break-even point, and GST — the numbers behind everyday financial decisions.
Health and Fitness
Find your BMI with healthy weight range, estimate daily calorie needs based on activity level, or use the scientific calculator for any health formula.
Academic and Educational
Calculate GPA and CGPA on India's 10-point scale, convert marks to percentage, find exact age for exam eligibility, and use the scientific calculator for board exam problems.
Work and Everyday Math
Track work hours and overtime pay, split restaurant bills with tips, calculate percentages in seconds, and solve any scientific function from the browser.
Frequently Asked Questions
- Are calculator results a substitute for professional advice?
- No. These calculators are estimation and planning tools. For financial, tax, legal, or medical decisions, consult a qualified professional. The results here help you understand your numbers before that conversation.
- Why does each calculator page have so much explanatory content?
- A number alone is rarely useful without context. The explanations help you understand what the result means, whether the inputs are correct, and what to do next. That is what separates a useful tool from a thin utility page.
- What kinds of visitors benefit from this category?
- Students preparing for exams, borrowers comparing loan options, small business owners pricing products, freelancers verifying timesheets, and anyone checking a financial or health estimate before acting.