No sign-up.
No cost.
Just answers.
Calculators and generators built for people running a small business — pricing, margins, invoices, and more. Pick a tool and get your number.
What tools and categories are available on SMBkits?
29 free tools across five categories.
- Pricing & Margins: Calculators for setting and checking prices — margin, markup, discounts, sales tax, and freelance rates.
- Financial Planning: Bigger-picture numbers for decisions that affect the whole business — break-even, ROI, and loan payments.
- Invoicing & Payments: Everything around getting paid — quotes, invoices, late fees, and chasing overdue payments.
- Hiring & People: The real cost of a new hire, and writing the posting to find them.
- Marketing & Content: Tracking links, QR codes, and AI-generated copy for reviews, leads, social posts, and product listings.
What free pricing and margin calculators are available?
Pricing & Margins
View all →How do I calculate profit margin for my small business?
Find your profit margin from cost and selling price, instantly.
How do I calculate markup percentage and selling price from cost?
Calculate markup percentage and selling price from your cost.
How do I calculate sale price from a discount percentage?
Calculate a sale price from a discount percentage, or the reverse.
How do I add or remove sales tax from a price?
Add or remove sales tax from a price in seconds.
How do I calculate the hourly rate to charge to hit my income goal?
Work out the hourly rate you need to charge to hit your income goal.
What financial planning tools does SMBkits offer for businesses?
Financial Planning
View all →How do I calculate my business's break-even point?
Find out how many units you need to sell to cover your costs.
How do I calculate return on investment?
Calculate return on investment as a percentage and dollar gain.
How do I estimate my monthly business loan payment?
Estimate your monthly payment on a business loan.
What free invoicing and payment generators are available?
Invoicing & Payments
View all →How do I calculate interest or a late fee on an overdue invoice?
Calculate interest owed on an overdue invoice, or a flat late fee.
How do I create a free professional PDF invoice?
Create and download a professional PDF invoice, free, in your browser.
How do I turn a job description into a professional quote?
Turn a job description into a clean, professional quote.
How do I write an email chasing a late payment?
Generate a firm but professional email chasing a late payment.
How do I tell a client about extra out-of-scope work and cost?
Tell a client about out-of-scope work and the added cost, without the awkwardness.
How do I end a client contract professionally?
End a client engagement clearly and professionally, without burning the bridge.
How do I calculate Stripe or PayPal processing fees?
Find out exactly what to charge to net a specific amount after processor fees.
What hiring and people tools does SMBkits provide for employers?
Hiring & People
View all →What marketing and content generators are available for small businesses?
Marketing & Content
View all →How do I build a campaign-tracked URL for marketing?
Build campaign-tracked URLs for your marketing links.
How do I generate a free QR code for my business?
Generate a free QR code for your business, no sign-up required.
How do I write a professional reply to a customer review?
Paste a customer review, get a professional reply draft in seconds.
How do I reply to a customer inquiry instantly?
Paste an inquiry, get 3 fast reply drafts to send right now.
How do I rewrite a LinkedIn post with a stronger hook?
Turn rough notes or a draft into a post with a stronger hook.
How do I write an SEO-ready product description?
Turn a product name and features into an SEO-ready listing.
How do I write a B2B cold email and follow-up sequence?
Turn your offer into a cold email and two follow-ups that don't read like spam.
How do I write a tailored Upwork or Fiverr proposal?
Paste a job posting, get a tailored proposal that doesn't read like a template.
How do I repurpose one piece of content into multiple formats?
Turn one piece of writing into a LinkedIn post, an X thread, and a newsletter blurb.
How do I turn a customer message into a clean testimonial?
Turn a messy thank-you message into a clean testimonial or mini case study.
How do I write a Google Business Profile description and services list?
Write your Google Business Profile description, services or menu list and attribute ideas.
How do I check how many competitors are near a business address?
Map nearby competitors, see the best-reviewed ones on Google Maps, and get a written market read.
Why it's free
No account, no card, no catch. Calculators run entirely in your browser and never send data anywhere; a few AI generator tools send only the text you enter to Google's Gemini API to produce a result. We keep the lights on with a small amount of advertising, not by charging small business owners for a calculator.
What are the frequently asked questions about SMBkits?
Q.Are the tools on SMBkits free to use?
Yes — every calculator and generator on SMBkits is completely free, with no sign-up, no card, and no usage limit.
Q.Do I need to create an account?
No. There's nothing to sign up for. Open a tool, enter your numbers, get your answer.
Q.Is what I type into a tool sent to a server or stored anywhere?
Calculators run entirely in your browser and never send data anywhere. A few AI-powered generator tools (marked as such) send only the text you enter to Google's Gemini API to produce a result — see the Privacy Policy for details.
Q.How does SMBkits make money if the tools are free?
Through a small amount of advertising, not by charging small business owners for a calculator.