Business calculators
Thai VAT 7%, withholding tax 1–5% and amount-in-Thai-words tools for invoices.
Thai VAT 7%
Enter an amount and choose to add VAT or take it out. Get the price before VAT, the VAT and the total.
Withholding tax
Work out withholding tax and VAT on an invoice, what you actually receive, or how much to invoice to receive a set amount.
Number to Thai words
Type an amount and get it in Thai words, e.g. 1,250 → หนึ่งพันสองร้อยห้าสิบบาทถ้วน — ready to copy.
Number to English words
Type a number to get it in English words, as a dollar amount and in cheque style.
Thai numerals converter
Paste text and swap 0–9 for Thai digits, or back again, in one click.
Roman numerals converter
Type a number to see it in Roman numerals, or Roman numerals to see the number — from 1 to 3,999.
Number base converter
Enter a number in any base and see it in binary, octal, decimal and hexadecimal at once.
ROI calculator
Enter the amount invested and the value returned to get the return in %, profit, multiple and annualised return.
Profit margin
Enter revenue, cost of goods and expenses to get each level of profit and margin, plus markup.
Break-even calculator
Enter fixed costs, price and cost per unit to see how many units or how much revenue you need to break even.
Discount calculator
Enter a price and % off to get the sale price, stack two discounts, take off a fixed amount, or work back to the original price.
Other categories
Money & tax · Dates · Health · Home & land · Maths & science