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Free Tools & Calculators for Small Business

Handy, no-signup tools for busy business owners — generate documents, run the numbers, and build tracking links right in your browser. Nothing you enter is uploaded anywhere.

These free tools are built by StandupCRM, the CRM and Google Ads platform for device-repair shops. Each one runs entirely client-side — no account, no watermark, no catch. Use them to send a quick invoice, check your margins before you quote, work out sales tax both ways, or tag a campaign link so you know which ads bring paying customers. New tools are added regularly.

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What free tools does StandupCRM offer?

StandupCRM offers 37 free browser-based tools in four categories: Documents (invoices, receipts, quotes, work orders), Calculators (sales tax, markup, ROI, LTV, break-even, VAT), PDF & File utilities (merge, split, convert to JPG), and Marketing tools (UTM builder, review-request generator, booking links). All run client-side — no account or signup needed.

Documents

Calculators

Sales Tax Calculator (Add or Reverse Tax, Any State Rate)

Add sales tax to a price, or run it in reverse — work backwards from a tax-included total to find the tax inside it. Enter your state or local rate for instant results.

Free Markup & Margin Calculator

Turn cost into price and see your margin — or enter a price and see the markup. Both directions, instantly.

Break-Even Point Calculator

Find your break-even point — the exact number of units and revenue you need to cover your costs and start making a profit.

Free ROI Calculator (with Annualized Return)

See the return on any investment as a clear percentage and dollar profit — plus an annualized rate if you enter a time period.

Free Discount Calculator (Stacked & Double Discounts)

Work out the sale price and how much a customer saves — including double (stacked) discounts, where a second percent-off applies on top of the first — instantly.

Free Customer Acquisition Cost Calculator

Find out what it really costs you to win one customer — and whether that’s sustainable against their lifetime value.

Customer Lifetime Value (LTV) Calculator

Work out how much revenue an average customer brings over their whole relationship with you — and how much you can afford to spend to win one. The customer lifetime value (LTV/CLV) formula, calculated instantly.

Free Freelance Hourly Rate Calculator

Work out the hourly rate you actually need to charge to hit your income goal after expenses, tax and time off.

VAT Calculator — Add or Remove VAT (UK 20%, 5% or Any Rate)

Add VAT to a net amount, or strip the VAT out of a gross, VAT-inclusive total — a reverse (backwards) VAT calculation — at the UK 20% or 5% rate, or any rate you enter. Instant, no signup.

Free Overtime Pay Calculator

Work out regular pay, overtime pay and total for a pay period at any overtime multiplier.

Net Pay Calculator — Take-Home Paycheck Estimate

Estimate take-home pay per paycheck or from an annual salary: enter gross, a tax percentage and any fixed deductions to see your net in seconds.

Monthly Cash Flow Calculator for Small Business

List your money in and money out for the month to see your net cash flow and closing balance — line by line, like a simple cash flow statement.

Free Late Fee Calculator for Overdue Invoices

Charging for a late payment? Enter the invoice amount, how many days it is overdue and your late-fee rule to see the penalty and the new balance due.

Free Deposit Calculator

Work out the deposit to collect up front and the balance due on completion for any job — by percentage or a fixed amount.

Free Job Cost Calculator

Price any repair or service job in seconds — add up materials and labor, apply your markup, and see the total cost, the price to quote, and your profit.

Free Invoice Due Date Calculator

Enter the invoice date and your payment terms and see the exact due date, the day it lands on, and how many days away it is — Net 15, 30, 60, 90 or any custom term.

Free Revenue Goal Calculator

Turn a revenue goal into a weekly plan — enter your monthly or annual target and your average job value to see exactly how many jobs you need to book.

Free Service Call Fee Calculator

Work out what to charge for a service call — build the fee from mileage, paid drive time, on-site diagnostic time and a markup, and see the full breakdown.

PDF & Files

Marketing

Want these built into your workflow?

StandupCRM turns clicks into customers for repair shops — landing pages, lead capture, and a full CRM dashboard.

See a live demo →