Tool	Category	Type	Description
Free Profit Margin Calculator for Small Business Pricing & Margins · calculator	Pricing & Margins	calculator	Find your profit margin from cost and selling price, instantly.
Free Markup Calculator — Cost to Selling Price Pricing & Margins · calculator	Pricing & Margins	calculator	Calculate markup percentage and selling price from your cost.
Free Break-Even Point Calculator for Businesses Financial Planning · calculator	Financial Planning	calculator	Find out how many units you need to sell to cover your costs.
Free Discount & Sale Price Calculator Online Pricing & Margins · calculator	Pricing & Margins	calculator	Calculate a sale price from a discount percentage, or the reverse.
Free Sales Tax Calculator — Add or Remove Tax Pricing & Margins · calculator	Pricing & Margins	calculator	Add or remove sales tax from a price in seconds.
Free Freelance Hourly Rate Calculator Tool Pricing & Margins · calculator	Pricing & Margins	calculator	Work out the hourly rate you need to charge to hit your income goal.
Free Employee Cost Calculator for Employers Hiring & People · calculator	Hiring & People	calculator	See what an employee really costs beyond their salary.
Free ROI Calculator — Return on Investment Financial Planning · calculator	Financial Planning	calculator	Calculate return on investment as a percentage and dollar gain.
Free Business Loan Payment Calculator Tool Financial Planning · calculator	Financial Planning	calculator	Estimate your monthly payment on a business loan.
Free Late Fee & Interest Calculator for Invoices Invoicing & Payments · calculator	Invoicing & Payments	calculator	Calculate interest owed on an overdue invoice, or a flat late fee.
Free Invoice Generator — Create a PDF Invoice Invoicing & Payments · calculator	Invoicing & Payments	calculator	Create and download a professional PDF invoice, free, in your browser.
Free UTM Link Builder for Marketing Campaigns Marketing & Content · calculator	Marketing & Content	calculator	Build campaign-tracked URLs for your marketing links.
Free QR Code Generator for Small Business Marketing & Content · calculator	Marketing & Content	calculator	Generate a free QR code for your business, no sign-up required.
Free AI Review Reply Generator for Small Business Marketing & Content · generator	Marketing & Content	generator	Paste a customer review, get a professional reply draft in seconds.
Free Quote & Scope-of-Work Generator Tool Invoicing & Payments · generator	Invoicing & Payments	generator	Turn a job description into a clean, professional quote.
Free Instant Reply Generator for Fast Responses Marketing & Content · generator	Marketing & Content	generator	Paste an inquiry, get 3 fast reply drafts to send right now.
Free AI Job Posting Generator for Employers Hiring & People · generator	Hiring & People	generator	Turn a role and a few bullet points into a full job posting.
Free Overdue Invoice Email Generator — Get Paid Invoicing & Payments · generator	Invoicing & Payments	generator	Generate a firm but professional email chasing a late payment.
Free LinkedIn Post Rewriter — Stronger Hooks Marketing & Content · generator	Marketing & Content	generator	Turn rough notes or a draft into a post with a stronger hook.
Free Product Description Generator for E-commerce Marketing & Content · generator	Marketing & Content	generator	Turn a product name and features into an SEO-ready listing.
Free Cold Email & Follow-Up Sequence Generator Marketing & Content · generator	Marketing & Content	generator	Turn your offer into a cold email and two follow-ups that don't read like spam.
Free Upwork & Fiverr Freelance Proposal Generator Marketing & Content · generator	Marketing & Content	generator	Paste a job posting, get a tailored proposal that doesn't read like a template.
Free Scope Creep Billing Email Generator Invoicing & Payments · generator	Invoicing & Payments	generator	Tell a client about out-of-scope work and the added cost, without the awkwardness.
Free Contract Termination Email Generator Invoicing & Payments · generator	Invoicing & Payments	generator	End a client engagement clearly and professionally, without burning the bridge.
Free Content Repurposer for Social Media Marketing & Content · generator	Marketing & Content	generator	Turn one piece of writing into a LinkedIn post, an X thread, and a newsletter blurb.
Free Testimonial & Case Study Formatter Tool Marketing & Content · generator	Marketing & Content	generator	Turn a messy thank-you message into a clean testimonial or mini case study.
Free Stripe & PayPal Fee Calculator Tool Invoicing & Payments · calculator	Invoicing & Payments	calculator	Find out exactly what to charge to net a specific amount after processor fees.
Free Google Business Profile Description Generator Marketing & Content · generator	Marketing & Content	generator	Write your Google Business Profile description, services or menu list and attribute ideas.
Free Local Competitor Map and Trade Area Analyzer Marketing & Content · generator	Marketing & Content	generator	Map nearby competitors, see the best-reviewed ones on Google Maps, and get a written market read.

Frequently asked questions

Q.What's the difference between a calculator and a generator tool?

Calculators run entirely in your browser and never send data anywhere. Generators (marked as such) use Google's Gemini API to produce written text, like a review reply or a job posting — see the Privacy Policy for details.

Q.How many tools are on SMBkits?

There are currently 29 free tools, covering pricing, financial planning, invoicing, marketing, and written content generation.

Q.Do I need to pick the 'right' tool, or can I just try one?

Just try one. Every tool is free with no sign-up, so there's no cost to trying a few before deciding which fits what you need.