Business Tools

Free calculators and tools for everyday business tasks — GST and tax, pricing and profit, finance, salary and HR, plus GST invoices. Calculations happen instantly in your browser.

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Ordered by what KaroDesk users actually use most.

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India GST Calculator

Add or remove GST at 0%, 5%, 18% or the 40% special rate with CGST, SGST and IGST split.

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GST Reverse Calculator

Work backwards from a GST-inclusive price to the taxable value and tax amount.

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Profit Calculator

Work out revenue, total cost, profit, margin and markup for any order quantity.

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Margin & Markup Calculator

Compare margin vs markup and find the selling price for a target margin.

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Discount Calculator

Apply a discount percentage, see savings and add sales tax, VAT or GST on the discounted price.

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EMI Calculator

Monthly EMI, total interest and total payable for any loan amount and tenure.

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India Income Tax Calculator

Calculate income tax for FY 2025-26 under the new and old regime with slabs, rebate and cess.

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Invoice Generator

Create a GST invoice with CGST, SGST, IGST and HSN codes, then download the PDF.

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Free Invoice Generator

Create a professional invoice for clients anywhere in the world — 35 currencies, custom VAT/GST/sales tax, PDF download and print.

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GST & Tax

Add or remove GST, split CGST/SGST/IGST and work out TDS on payments.

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India GST Calculator

Add or remove GST at 0%, 5%, 18% or the 40% special rate with CGST, SGST and IGST split.

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GST Reverse Calculator

Work backwards from a GST-inclusive price to the taxable value and tax amount.

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IGST Calculator

Calculate IGST on inter-state supplies and exports at any GST slab.

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TDS Calculator

Deduct TDS at common section rates and see the net amount payable.

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GST Registration Checker

Check your GST registration threshold by state and supply type, and whether Section 24 makes registration mandatory regardless of turnover.

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Pricing & Profit

Price your products, check margin vs markup and find your break-even point.

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Profit Calculator

Work out revenue, total cost, profit, margin and markup for any order quantity.

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Margin & Markup Calculator

Compare margin vs markup and find the selling price for a target margin.

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Markup Calculator

Add a markup percentage on cost price to get your selling price and profit.

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Discount Calculator

Apply a discount percentage, see savings and add sales tax, VAT or GST on the discounted price.

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Selling Price Calculator

Set a selling price from cost price using a target margin or markup, then add your tax rate.

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Break-even Calculator

See how many units you must sell to cover fixed costs at your price point.

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Commission Calculator

Calculate sales commission, any tax withheld from the payout and what your business keeps.

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Finance

EMIs, loan eligibility, returns and monthly cash flow in plain numbers.

ROI Calculator

Measure return on investment and the annualised return over a holding period.

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EMI Calculator

Monthly EMI, total interest and total payable for any loan amount and tenure.

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Loan Calculator

Find the loan amount your monthly EMI budget can comfortably service.

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Cash Flow Calculator

Track money in, money out, closing balance and how long your cash lasts.

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Salary & HR

Turn CTC into in-hand pay, check deductions and calculate overtime.

India Salary Calculator

Convert monthly gross salary into net pay after PF, professional tax and TDS.

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India CTC Calculator

Break an annual CTC into gross salary, employer PF, gratuity and in-hand pay.

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India Income Tax Calculator

Calculate income tax for FY 2025-26 under the new and old regime with slabs, rebate and cess.

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Overtime Calculator

Work out hourly rate, overtime pay at 1.5x or 2x and total monthly wages.

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India HRA Calculator

Work out your exempt and taxable HRA for FY 2025-26 under Section 10(13A), metro or non-metro.

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Billing & Documents

Create GST invoices and quotations you can download, print or share.

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Invoice Generator

Create a GST invoice with CGST, SGST, IGST and HSN codes, then download the PDF.

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Free Invoice Generator

Create a professional invoice for clients anywhere in the world — 35 currencies, custom VAT/GST/sales tax, PDF download and print.

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International Quote Generator

Create a professional quote or estimate for clients anywhere in the world — 35 currencies, custom VAT/GST/sales tax, a valid-until date, PDF download and print. Convert to an invoice once accepted.

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Image & File Tools

Resize images for the web, social posts and documents, right in your browser.

Resize Image

Change image dimensions in pixels, by percentage or to a common size, and download a JPG, PNG or WebP. Processed in your browser.

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Get free business tips

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