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Free calculators and estimators that people actually use. Open any tool to use it, or grab the embed code for your website.
Freelancer Rate Calculator
Find the hourly rate you need to hit your income goal.
Startup Runway Calculator
See how many months of runway you have left.
Profit Margin Calculator
Calculate your profit before you set your price.
Project Quote Calculator
Estimate what you should charge for a client project.
Salary to Hourly Rate Calculator
Turn your annual or monthly pay into a real hourly rate.
Percentage Calculator
Calculate percentages without doing the math yourself.
Loan EMI Calculator
Calculate your monthly loan payment instantly.
GST Calculator
Add or remove GST from any price.
SIP Calculator
Estimate how your monthly SIP could grow over time.
Age Calculator
Calculate your exact age in years, months, and days.
Ask AI About Your Business
Let visitors ask ChatGPT, Claude, and more about you.
Discount Calculator
See what you actually pay after a discount.
Break-Even Calculator
Find how many units you need to sell to break even.
ROI Calculator
Work out the return on your spend or campaign.
VAT Calculator
Add or remove VAT from any price.
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Want a calculator on your website?
Every Plainso tool comes with embed code. No sign-up required.