Tools
Free calculators for tax, invoices and stock
Small tools for the sums a business does every week, each with the formula and a worked example on the page.
In short
SimpleERP offers free tools for small businesses: a VAT/GST calculator for any rate, an amount in words converter for many currencies, a depreciation schedule and weighted average cost. Most run the product's own functions.
Pick a tool
VAT/GST calculator
Add VAT, GST or sales tax to a price, or take it out of a price that includes it, at any rate.
Open the toolAmount in words converter
Turn an amount into words in dollars, pounds, euros, dirhams and other currencies, ready for an invoice or cheque.
Open the toolDepreciation schedule calculator
A year-by-year depreciation schedule by straight line or reducing balance, for any asset and any currency.
Open the toolWeighted average cost calculator
See the new average cost and stock value after a purchase arrives at a different price.
Open the tool
For businesses in India
These pages cover rules and tools that exist only in India.
India
GST calculator
Add GST to a price and see the CGST, SGST or IGST split from the seller's and buyer's states.
Open the toolIndia
Reverse GST calculator
Take GST out of a GST-inclusive price or MRP and see the taxable value and the tax split by state.
Open the toolIndia
GSTIN validator
Check a GSTIN's format and check character, and read the state and PAN out of it.
Open the toolIndia
Amount in words
Turn a rupee amount into words the Indian way, in lakh and crore, with paise, ready for an invoice or cheque.
Open the toolIndia
Depreciation calculator
A year-by-year depreciation schedule by straight line or written down value, with the Companies Act Schedule II useful lives.
Open the toolIndia
Salary breakup calculator
Split a monthly CTC into basic, HRA, PF and special allowance, with an in-hand estimate and whether PT applies in the state.
Open the tool
How to choose
Built on the product's own code where it can be
The tax calculator, amount in words and weighted average cost run the same functions SimpleERP uses on real invoices and stock, so the answer here matches the product. The depreciation tool is a planning estimate, and its page says how the product differs.
- Any rate, any currency. The VAT/GST calculator takes the rate you type, and the words converter writes dollars, pounds, euros, dirhams and more.
- Exact decimals, not floating point. Amounts are rounded to the cent, so 1,000 at 20% is 200.00, never 199.99.
- The formula is on every page. Each tool writes its maths out with a worked example, so you can check it by hand.
- Estimates labelled as estimates. Depreciation shows yearly figures where the product posts monthly, pro-rated schedules.
- Honest limits. Each page says what the tool does not do, such as reduced rates or tax depreciation.
FAQ
Questions, answered
Are these tools free?
Yes. Every tool on this page is free to use with no sign-up. The tools run in your browser and do not save what you type.
How accurate is the VAT/GST calculator?
The arithmetic is exact to the cent and matches a SimpleERP invoice line. The answer is only as right as the rate you type, so confirm the rate for your goods with your accountant or tax authority before you rely on it.
Does it work for US sales tax?
Yes. Enter the combined state and local rate for the place of sale and add the tax on top. The calculator does not look up rates for you.
Are there tools for India?
In India, the GST calculators, GSTIN validator, salary breakup and the lakh and crore amount in words tool are listed further down, under For businesses in India.
Stop doing the maths by hand
In SimpleERP the tax, the total in words, depreciation, payroll deductions and the average cost of stock are worked out as you post. Start with your first invoice.