Free calculators for stands, CSAs and small sellers
Work out prices, margins and card fees from your own numbers. No account needed. Nothing you type into a calculator is saved.
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Show all calculatorsClear your search and list every calculator.- Fertilizer calculator from a soil test How much fertilizer do I need for the rate my soil test calls for?
- Plant spacing and seed calculator How many plants fit in my beds, and how much seed do I need?
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- Sell & priceFree calculators for working out a price, a markup or a margin from your own costs.
- Get paidFree calculators for what a card payment costs you and what to charge to keep the amount you want.
- Spray & mixFree calculators for the arithmetic around a rate you read from the product label: amount per tank, tanks per area.
- Raise: livestock & pastureFree calculators for feed, hay and herd numbers, worked out from the animals and the days you give.
- Measure & convertFree calculators for areas, volumes and unit conversions that come up on a farm.
- Run the businessFree calculators for break-even, costs and budgets, from your own figures.
- Events & agritourismFree calculators for market days and farm visits: what you need to sell, and how many people you can serve.
What would TallyTill cost me? These calculators are about your own numbers. For TallyTill's plans, fees and savings, use the calculators on Pricing.
See pricingOpen TallyTill's plans and its own calculators.Put a calculator on your own website. One line of code, free. Numbers are sent to our calculator to work out the answer, and never stored.
Embed a calculatorSee how to add a calculator to your website.Use the calculators in an AI chat
You can ask Claude, ChatGPT or another AI app to work out any of these calculators for you, and the calculator opens right inside the chat. You connect TallyTill to your AI app once. There is no account and no sign-in.
AI apps call add-ons like this connectors, apps or MCP servers. They all mean the same thing: a way for the AI to use a tool someone else made.
1. Copy this address
2. Add it to your AI app
Claude (claude.ai and the Claude desktop app)
- Open Customize, then Connectors.
- Press + Add, then Add custom connector.
- Name it TallyTill calculators, paste the address and press Continue.
- Under Authentication choose No sign in, then press Add.
- In a new chat, press + at the bottom left, choose Connectors and switch TallyTill calculators on.
On Claude's free plan you can add one custom connector.
ChatGPT
- In Settings, turn on Developer mode. OpenAI moves this switch from time to time; it is usually with the settings for apps and connectors.
- Add a new connector (ChatGPT may call it an app), paste the address and choose No authentication.
- In a new chat, choose TallyTill from the tools menu, or type @ and pick it.
Not every ChatGPT plan lets you add your own connector. If you cannot find the option, your plan may not include it.
Using another AI app? Look in its settings for MCP, add the address as a remote server, and choose no sign-in.
3. Ask your question
Say "use TallyTill", so the AI uses the calculator instead of doing the sum itself. For example:
"Use TallyTill: What price should I charge to keep the margin I want?"
What you will see
- The calculator opens in the chat with the numbers you gave already filled in. Change any number and the answer updates.
- If a number is missing, the box is highlighted, or the AI asks you for it in plain words.
- The answer links back to the calculator's own page, so you can check the working.
- The first time, your AI app asks if it may use TallyTill. Choose Allow.
The calculators take numbers only. They never ask for your name, your email or a password.
Results are arithmetic on the numbers you enter, not financial or legal advice.