Calculators

Calculators That Match How People Actually Use Numbers

Phone calculators are great for arithmetic and useless for everything beyond it. The moment a calculation involves more than four numbers — an EMI schedule, a GST split, a BMI lookup against a chart, an age expressed in days and hours — the basic calculator becomes a frustration. The calculators collected here exist for those moments: each one is purpose-built for a specific real-world calculation that takes 30 seconds with the right tool and 10 minutes with a spreadsheet you have to build from scratch.

Every calculator runs entirely in your browser. No account, no signup, no upload, no logging. That matters more than it sounds for financial calculations — you should be able to model your loan options, compare EMIs, or check what a percentage discount actually means without leaving a paper trail on some third-party server.

When to Reach for Each Calculator

Six calculators that solve distinct problems. A quick guide to picking the right one:

• Age Calculator — exact age in years, months, days, hours, minutes. Useful for legal documents, official forms, age-difference comparisons, and milestone planning.
• EMI Calculator — monthly equated installment for home, car, or personal loans. Shows the principal-vs-interest breakdown across the full tenure so you can see how much of each payment is interest.
• GST Calculator — Indian goods-and-services tax computation including CGST/SGST/IGST splits across all current slab rates (5%, 12%, 18%, 28%). Works for both forward calculation (price → tax) and reverse (price-inclusive → tax component).
• Percentage Calculator — any percentage operation: percent of a number, percentage change between two values, percentage increase or decrease. Five separate modes so you do not have to remember the formula.
• BMI Calculator — body mass index with both metric (cm, kg) and imperial (ft/in, lb) units, plus the WHO classification table so you understand what your BMI bracket actually means.
• Loan Interest Calculator — simple and compound interest with year-by-year breakdown. Useful for fixed deposits, savings projections, and short-term loan comparisons where you want to see the cumulative interest growth.

Common Use Cases

Five situations where these calculators replace clunkier workflows:

• Comparing loan offers from different banks — run all three through the EMI Calculator with the same principal and tenure, then compare total interest paid
• Pricing products for GST-inclusive vs GST-exclusive markets — reverse GST mode lets you set a customer-visible price and see what the underlying base price is
• Calculating a markup, discount, or year-over-year growth — Percentage Calculator handles all three with separate modes so you do not have to remember which formula is which
• Checking eligibility for age-restricted services or programs — Age Calculator shows down to the minute, which matters when documents are filed
• Modeling a savings goal — Loan Interest Calculator in compound interest mode shows what regular deposits will grow to over time

Accuracy and Limits

Two things worth knowing about how these calculators work:

• Calculations use full floating-point precision and standard formulas — the same math your bank, accountant, or doctor would use. For EMI, this is the standard P × R × (1+R)^N / ((1+R)^N − 1) formula. For BMI, weight in kg divided by height in m squared. No rounding tricks, no marketing-friendly inflation of results.
• These tools are calculators, not advice. An EMI calculation does not account for processing fees, prepayment penalties, or floating interest rates. A BMI value does not replace a doctor's assessment. Use the numbers as a starting point, not a final answer.