Free finance, tax and business calculators
Calculate GST at the current Indian rates, loan EMIs, FY 2026-27 income tax, compound interest, ROI, margins, commissions, shipping weight, currency conversion fees, and AI token costs. Tax calculators show the date they were last reviewed and link to their official sources. Results are estimates, not tax or financial advice.
LLM Token & Cost EstimatorEstimate prompt and output tokens at about 4 characters per token and project monthly LLM API cost in USD from your own rates. Runs in your browser.Shipping CalculatorWork out volumetric and chargeable weight from parcel dimensions, then estimate shipping cost with your rate, handling and insurance. Runs in your browser.GST CalculatorAdd or remove GST at the rates in force from 22 Sep 2025 (5%, 18%, 40% and special rates) with a CGST, SGST or IGST split. Free and runs in your browser.Currency Conversion & FX Fee CalculatorConvert an amount at an exchange rate you enter, then see the effect of FX spread, percentage and fixed fees. Not a live rate feed. Runs in your browser.Claude Code Cost CalculatorEstimate Claude Code costs per task and per month from tokens, USD rates and prompt-cache hits, and compare them with a budget. Runs in your browser.Commission CalculatorCalculate sales commission for percentage, fixed or tiered plans, with quota accelerators and clawbacks, and see the effective rate. Runs in your browser.Profit Margin CalculatorCalculate profit margin, markup, break-even units and the price for a target margin from cost, price, volume and overhead. Free and runs in your browser.EMI CalculatorCalculate loan EMI, total interest and the amortization schedule, and see how prepayments and fees change the cost. Free and runs in your browser.Income Tax Calculator FY 2026-27Estimate income tax for FY 2026-27 under the new and old regimes, with the ₹12 lakh rebate, ₹75,000 standard deduction and 4% cess. Runs in your browser.Compound Interest CalculatorSee how savings grow with compound interest and monthly deposits, choose the compounding frequency, and adjust for tax and inflation. Runs in your browser.ROI CalculatorCalculate return on investment, annualized ROI, NPV at your discount rate, and payback period from yearly cash flows. Free and runs in your browser.Advanced Loan SimulatorModel a business loan with a moratorium, capitalized or serviced interest, an upfront subsidy and fees, and see the EMI and schedule. Runs in your browser.