KaroDeskYour Business, Simplified.
Free business calculators, pricing and finance tools, and professional invoicing — everything freelancers, small businesses, consultants and agencies need for the everyday numbers, in one clean place.
- Free to use
- Works worldwide
- GST-ready
- No complicated setup
Popular tools
Free calculators and generators for invoicing, tax, pricing and everyday business maths.
Browse by category
Five focused groups covering tax, pricing, finance, payroll and billing.
GST & Tax
Add or remove GST, split CGST/SGST/IGST and work out TDS on payments.
6 toolsView toolsPricing & Profit
Price your products, check margin vs markup and find your break-even point.
7 toolsView toolsFinance
EMIs, loan eligibility, returns and monthly cash flow in plain numbers.
4 toolsView toolsSalary & HR
Turn CTC into in-hand pay, check deductions and calculate overtime.
5 toolsView toolsBilling & Documents
Create GST invoices and quotations you can download, print or share.
3 toolsView toolsCreate professional invoices in minutes.
Fill in your business, customer and line items — KaroDesk handles the tax split, round-off, amount in words and payment QR, then hands you a clean A4 PDF.
- GST and IGST handled automatically
- HSN / SAC codes on every line item
- CGST + SGST split for intra-state supply
- UPI QR code for faster payment
- One-tap A4 PDF download and print
- Customer management with saved details
Billing clients outside India? Try the Free Invoice Generator with 35 currencies and custom VAT, GST or sales tax.
Why KaroDesk?
Built for modern businesses
From GST slabs and CGST/SGST/IGST splits to multi-currency invoices for international clients.
Simple and fast
Open a tool and type. Results update instantly — no setup, no onboarding, no waiting.
GST-ready calculations
Deterministic formulas rounded to two decimals, matching how you bill and file.
Everything in one place
22 calculators plus invoicing, customers and history under one clean workspace.
How it works
- 1
Choose a tool
Pick a calculator or the invoice generator from the tools directory.
- 2
Enter your numbers
Type amounts, rates or line items with mobile-friendly inputs.
- 3
Get instant results
Copy the figures, or download and share a ready invoice PDF.
Free tools for everyday business decisions
Used by freelancers, shops, consultants and small businesses around the world — from a first-time founder sending their first invoice to an agency billing clients in another currency.
- No sign-up needed to use any calculator
- Calculations run in your browser, not on our servers
- Invoices follow standard GST tax invoice structure
Frequently asked questions
Run your business with less effort.
From GST calculations to invoices and business finance tools, KaroDesk keeps the everyday work simple.
All tools
GST Calculator
Add or remove GST at 0%, 5%, 12%, 18%, 28% with CGST, SGST and IGST split.
Use toolGST Reverse Calculator
Work backwards from a GST-inclusive price to the taxable value and tax amount.
Use toolCGST Calculator
Find the Central GST half of an intra-state supply at any GST rate.
Use toolSGST Calculator
Find the State GST half of an intra-state supply and the total tax payable.
Use toolIGST Calculator
Calculate IGST on inter-state supplies and exports at any GST slab.
Use toolTDS Calculator
Deduct TDS at common section rates and see the net amount payable.
Use toolProfit Calculator
Work out revenue, total cost, profit, margin and markup for any order quantity.
Use toolMargin & Markup Calculator
Compare margin vs markup and find the selling price for a target margin.
Use toolMarkup Calculator
Add a markup percentage on cost price to get your selling price and profit.
Use toolDiscount Calculator
Apply a discount percentage, see savings and add GST on the discounted price.
Use toolSelling Price Calculator
Set a selling price from cost price using a target margin or markup percentage.
Use toolBreak-even Calculator
See how many units you must sell to cover fixed costs at your price point.
Use toolCommission Calculator
Calculate sales commission, TDS on the payout and what your business keeps.
Use toolROI Calculator
Measure return on investment and the annualised return over a holding period.
Use toolEMI Calculator
Monthly EMI, total interest and total payable for any loan amount and tenure.
Use toolLoan Calculator
Find the loan amount your monthly EMI budget can comfortably service.
Use toolCash Flow Calculator
Track money in, money out, closing balance and how long your cash lasts.
Use toolSalary Calculator
Convert monthly gross salary into net pay after PF, professional tax and TDS.
Use toolCTC Calculator
Break an annual CTC into gross salary, employer PF, gratuity and in-hand pay.
Use toolTake-home Salary Calculator
See monthly take-home pay from annual gross after every standard deduction.
Use toolIncome Tax Calculator
Calculate income tax for FY 2025-26 under the new and old regime with slabs, rebate and cess.
Use toolOvertime Calculator
Work out hourly rate, overtime pay at 1.5x or 2x and total monthly wages.
Use toolInvoice Generator
Create a GST invoice with CGST, SGST, IGST and HSN codes, then download the PDF.
Use toolFree Invoice Generator
Create a professional invoice for clients anywhere in the world — 35 currencies, custom VAT/GST/sales tax, PDF download and print.
Use toolInternational 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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