Calculator Tools — Complete Usage Guide

Free online calculators for finance, health, and academics — all running directly in your browser.

DevriQ's calculators are built for accuracy and speed. They all run client-side — no data is sent to servers. Results are instant, and the GST and EMI calculators are specifically tuned for Indian financial contexts.

💡Tip

All calculators work offline once the page has loaded. Bookmark your most-used ones for quick access.

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EMI Calculator

Calculate monthly loan EMI for home, car, or personal loans.

Inputs

→Principal amount (loan amount)
→Annual interest rate (%)
→Loan tenure (months or years)

Output

Monthly EMI, total interest payable, and a full amortization schedule you can download as CSV.

💡 Tip: Indian home loan interest rates typically range from 8–9.5% p.a. Try different tenures to find the best monthly payment.

Open EMI Calculator →

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GST Calculator

Add GST to a base price or remove GST from an inclusive price.

Inputs

→Base price or GST-inclusive price
→GST rate (5%, 12%, 18%, or 28%)

Output

CGST, SGST (or IGST), and total price with GST. Breakdown shown for multi-item invoices.

💡 Tip: Use 'Remove GST' mode when you have the final MRP and need to calculate the base price for invoicing.

Open GST Calculator →

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CGPA Calculator

Convert CGPA to percentage or calculate semester GPA.

Inputs

→CGPA value and grading scale (10-point or 4.0 scale)
→Or enter individual subject grades and credits

Output

Percentage equivalent, cumulative GPA, and grade point breakdown.

💡 Tip: For most Indian universities using a 10-point scale, multiply CGPA by 9.5 to get percentage.

Open CGPA Calculator →

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BMI Calculator

Calculate Body Mass Index and understand your weight category.

Inputs

→Height (cm or feet/inches)
→Weight (kg or pounds)

Output

BMI value with WHO category (Underweight / Normal / Overweight / Obese) and ideal weight range.

Open BMI Calculator →

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Salary Calculator

Calculate take-home salary after taxes in India, US, or UK.

Inputs

→Annual CTC (Cost to Company)
→Tax regime (India: Old vs New), Filing status (US/UK)

Output

Monthly in-hand salary, tax deductions, PF/ESI contributions, and effective tax rate.

💡 Tip: India: Use New Tax Regime if your CTC is below ₹15L. Use Old Regime if you have significant deductions (HRA, 80C, etc.).

Open Salary Calculator →

More calculators included

Also available: Age Calculator, Percentage Calculator, Calorie/TDEE Calculator, Currency Converter, Unit Converter, Discount Calculator, Date Difference Calculator, Scientific Calculator, and Tip/Bill Split Calculator.

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