Use them. Share them. Embed them.
Free calculators, estimators, and other useful tools for freelancers, founders, and small businesses. Use them yourself, or add one to your website in minutes.
Your visitors have questions. Your site makes them guess.
Every business website has the same gap: people land, have a real question — “how much should this cost?” — and leave because the answer isn't on the page.
Static pages stall
Visitors read, nod, and leave — without anything to do or anywhere to go.
Contact forms wait
“Contact us” asks for commitment before offering value. Most visitors aren't ready for that step.
Answers are buried
The question that would win the visitor — pricing, timeline, savings — is hidden in a PDF or a phone call.
Plainso tools answer those questions — on your site, in seconds.
This can be on your website
A working calculator — inside a page just like yours. Your visitors get the answer immediately, and you get the interaction.
See how to embed itTools people actually use
Free to use. Ready to embed.
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 salary into a real hourly rate.
Loan EMI Calculator
Calculate your monthly loan payment instantly.
What can you add to your website?
Plainso is growing beyond calculators — every interactive tool you see here can live on your site.
Calculators
Help visitors calculate costs, rates, payments, margins, and more.
Estimators
Let visitors estimate project costs, budgets, savings, and timelines.
Quizzes
Help visitors find the right product, service, or option.
Assessments
Turn questions into useful scores and recommendations.
Put a useful tool on your website in 5 minutes
Give your visitors something useful instead of another static page or contact form.
Pick a tool
Choose a calculator or estimator that fits your website — a project quote tool, a rate estimator, an EMI calculator.
Copy the code
On any tool page, hit 'Get embed code' and copy the one-line iframe snippet.
Paste it
Works on WordPress, Shopify, Webflow, and plain HTML. No JavaScript, no API keys, no setup.
No coding. No API. No account required.
Built for businesses that want to be useful
Put tools on your site that answer the questions your customers actually ask.
Freelancers
Help prospects calculate rates, project costs, or budgets.
Agencies
Let prospects estimate project costs before they contact you.
Founders
Add calculators that explain your product, pricing, or business model.
Small businesses
Help customers calculate, compare, and decide.
Don't take our word for it
See what the world's smartest assistants have to say about Plainso.
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Tell us what you want to calculate, estimate, or build. We may add it.
Frequently asked questions
Quick answers about Plainso.
Are the tools free?
Yes. All Plainso tools are free to use. Embedding them on your website is also free, with a small 'Powered by Plainso' link.
Can I put a Plainso tool on my website?
Yes. Most tools can be embedded with a simple iframe — no coding, no API keys, no account required.
Where can I embed Plainso tools?
WordPress, Shopify, Webflow, and any website that supports HTML embeds. Copy the one-line snippet and paste it in.
Do I need to code or use an API?
No. The embed is a single iframe snippet. There are no API keys, integrations, or configuration files.
Do I need an account to use or embed tools?
No. There are no accounts. Tools run entirely in your browser, and embed code is available on every tool page.
Can I remove the 'Powered by Plainso' branding?
Not yet. Removing branding and unlocking extra features like lead capture and custom branding is planned for a paid tier, once we see real embedding demand.
Ready to engage your visitors?
Find a tool and add it to your site in under 5 minutes. Free, with a small “Powered by Plainso” link.