From a price to an invoice
Check a selling price, propose the work, then prepare the invoice when it is due.
61 tools · 9 categories · Free to use
Free calculators & tools. Made for your work.
Practical calculators and everyday tools for small business. Find an answer, prepare a document and get on with your day.
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Featured tools
Understand your price
Markup Calculator
See what a markup means for your selling price and margin.
Open the Markup Calculator
Present your work clearly
Invoice Generator
Create a clear PDF with your details, logo and totals.
Open the Invoice Generator
Get your files in order
Merge PDF
Arrange your files and combine them on your device.
Open Merge PDFTHE TOOL LIBRARY
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Small tasks, sorted.
Business Finance21 tools
Set a price, check your margin, compare marketing costs or plan your next cash decision.
Compare Business Finance toolsPercentage Difference Calculator
Compare two values using their average, see the steps and keep a comparison worksheet.
Pressure Washing Cost Calculator
Price measured surfaces at your rates, apply one minimum and print an itemized estimate.
Lawn Mowing Cost Calculator
Price a mowing visit from your crew’s own time and costs. Check margin, plan a season and keep a clear customer summary.
House Cleaning Cost Calculator
Price a cleaning visit from your crew’s time and costs. Check profit, compare another quote and keep a CSV worksheet.
Landed Cost Calculator
Find what each imported product costs after freight, insurance and other shipment charges.
Wholesale Price Calculator
Find a wholesale price that works for both you and the retailer, using your costs and target margins.
Cake Pricing Calculator
Price a cake from ingredients, labor and other entered costs. Compare margin with markup and save your costing sheet.
Discount Calculator
Calculate percent off, stack discounts or find the original price. See the exact price after each step.
Profit Margin Calculator
Calculate profit margin from costs and revenue, or find the price you need for a target margin.
Markup Calculator
Find a selling price from cost and markup. See profit and margin alongside it.
Break-Even Point Calculator
Find how many sales cover your costs. Add a profit goal to see the sales target you need.
Cash Runway Calculator
See how long your cash could last. Compare monthly income and spending, growth plans and funding needs.
Reverse Sales Tax Calculator
Find the price before tax and the tax included in a total, using your sales tax rate.
DSO Calculator
Estimate how long it takes to collect credit sales. Compare days sales outstanding with your payment terms.
ROAS Calculator
Calculate campaign ROAS, then use your order costs to find break-even and target advertising returns.
CPM Calculator
Calculate CPM, budget or impressions and compare the combined cost of two placements.
CTR Calculator
Calculate ad click-through rate or plan the clicks and impressions needed for a goal.
Conversion Rate Calculator
Find your conversion rate from users, sessions or ad interactions. Choose the count that fits your campaign.
Percentage Calculator
Find a percentage of a number, what percent one value is of another, or the whole from a part and percent.
Percentage Change Calculator
Find the percentage increase or decrease between two values, along with the difference in numbers.
Customer Acquisition Cost Calculator
Calculate customer acquisition cost and the contribution needed to recover it.
Invoices & Payments4 tools
Turn the details of a job or purchase into a clear quote, invoice, purchase order or expense report.
Explore Invoices & PaymentsExpense Report Generator
Record expenses, separate company-paid costs and apply an advance. Review the balance and download your PDF or CSV report.
Purchase Order Generator
Create a purchase order with supplier details, items and delivery terms. Review and download your PDF.
Invoice Generator
Create a USD invoice with your logo, clear totals and a free PDF download. Remember your details on this device for next time.
Quote Generator
Define the work and exclusions, price each service, check your margin privately and download a client-ready quote PDF.
Time & Pay10 tools
Add up work hours, compare pay, count business days or prepare a calendar event.
Explore Time & PayFuture Salary Calculator
Project annual salary growth, compare raises and see the buying power of future pay.
Pay Raise Calculator
Calculate a pay raise from a percentage, dollar increase or new salary. Compare two options and see the change per paycheck.
Mileage Reimbursement Calculator
Calculate business mileage trip by trip using dated 2026 IRS rates or your agreed rate. Keep a complete CSV worksheet.
Commission Calculator
Work out sales commission at a flat rate or in tiers. Add base pay and download a sales statement.
Timecode Calculator
Add or subtract video durations and convert timecode to frames or frames to timecode. Review every row and download the complete worksheet.
ICS File Generator
Create a timed or all-day calendar event. Review the timezone and download an ICS file without an account.
PTO Accrual Calculator
Calculate earned PTO and track your balance after time off. Include your starting balance and policy cap.
Business Days Calculator
Count business days or add and subtract working days. Check each date and observed US holidays.
Time Card Calculator
Turn one or two weeks of work into a clear time card. Add split or overnight shifts, save locally and keep a useful report.
Salary Calculator
Convert hourly pay to salary, or salary to hourly pay. Compare two offers using your working schedule.
Inventory & Operations11 tools
Work out when to reorder, how much to buy and what you need to finish the job.
Explore Inventory & OperationsWork Order Generator
Describe the job, assign responsibility and record completion. Add optional labor and parts, then review your PDF or CSV.
Freight Density Calculator
Find shipment density from packed dimensions and weight. Combine different package sizes in one worksheet.
5 Whys Template
Download a blank 5 Whys template or record a problem, why chain, evidence and follow-up action online.
Grain Bin Capacity Calculator
Calculate the grain volume in round bins with a flat, peaked or coned-down surface. Save a multi-bin worksheet.
Lead Time Calculator
Plan delivery and order-by dates from supplier, shipping, receiving and buffer days.
Acres Per Hour Calculator
Estimate acres per hour, suitable field days and the working width needed for a target area.
SKU Generator
Create consistent SKUs for product variants. Check for duplicate codes and download your catalogue as CSV.
Reorder Point Calculator
Find when to reorder from demand, lead time and safety stock. Compare the trigger with your current stock.
Safety Stock Calculator
Estimate a stock buffer for changes in demand and delivery times, using your data and service target.
Economic Order Quantity Calculator
Balance ordering and holding costs. Compare case packs, supplier minimums and your current order quantity.
Inventory Turnover Calculator
See how often you sell through inventory and how many days stock stays on hand.
Documents5 tools
Put pages in order, combine files, turn photos into a PDF or save PDF pages as images.
Explore DocumentsMerge PDF
Bring proposals and supporting records together. Preview, arrange and combine PDFs on your device.
JPG to PDF
Arrange photos and screenshots, preview A4 or Letter pages, and download a PDF without uploading files.
PDF to JPG
Choose PDF pages, set image quality and preview the actual output. Download JPG or PNG without uploading files.
Split PDF
Set the page boundaries, see exactly what each file will contain, and split a PDF without uploading it.
Organize PDF
Move, rotate or remove PDF pages, check the exact order, then download one local PDF.
Data Tools3 tools
Find a business classification using official definitions, or convert JSON records into a spreadsheet-ready table.
Explore Data ToolsSIC Code Lookup
Find a US SIC code by business activity. Read the official descriptions and compare possible matches.
NAICS Code Finder
Find your 2022 US NAICS code. Search business activities, explore industries and compare possible matches.
JSON to CSV Converter
Turn JSON into a CSV spreadsheet. Choose your columns, check the preview and download the full table.
Home Projects5 tools
Plan flooring, mulch and deck stain purchases. Compare whole-package quantities, spare material and costs.
Explore Home ProjectsGravel Driveway Calculator
Measure a driveway, plan each gravel layer and turn the quantities into a supplier order worksheet.
Post Hole Concrete Calculator
Allow for the post inside each hole, compare bag rounding and keep a concrete purchase worksheet.
Deck Stain Calculator
Measure deck and railing faces, calculate each coat and compare whole cans or pails.
Mulch Calculator
Measure beds and tree rings, allow for existing mulch and compare whole bags with delivered bulk.
Vinyl Plank Flooring Calculator
Plan vinyl plank flooring for several rooms. Compare carton quantities, waste, spares and complete material costs.
Image Tools1 tool
Resize a JPG or PNG to the pixels or percentage you need, then preview and download it.
Explore Image ToolsText Tools1 tool
Check the length of a draft or selected passage, and see how it fits your writing target.
Explore Text ToolsTools that work well together
Use each result in your next task.
You choose what to copy across.
From low stock to a purchase order
Find your reorder trigger, compare an order quantity, then document the purchase.
From loose files to one clear PDF
Turn images into pages, combine supporting files, then arrange the final document.
Useful from start to finish
Understand the result.
Keep your work.
Check a result and understand what went into it. Our calculators explain their formulas and assumptions; our document tools let you review your work before downloading it.
Your entries and files are processed in your browser. Save supported drafts on your device when you choose, or download the finished work for later.
About these free tools
Are the tools really free?
Yes. You can use the published calculators and download the files they create without paying or creating an account. Choose a tool above to get started.
Which calculator should I use for pricing?
Use the Markup Calculator to add a percentage to cost, or the Profit Margin Calculator to work toward a margin on the selling price. For a specific job, try the House Cleaning, Lawn Mowing or Cake Pricing Calculator.
Can I use BiznTools on my phone?
Yes. The tools run in a web browser on a phone, tablet or computer. No app installation is needed. File tools use your browser’s file picker and download controls.
Are these tools designed for US businesses?
US small businesses and professionals are our starting point. Tools with US-specific rates, classifications, holidays or currency explain that scope on the page. General percentage, image, text and PDF tools can also help with work elsewhere.
See two worked calculation examples
A sales target you can check.
- Fixed costs
- $5,000.00
- Price per unit
- $50.00
- Variable cost per unit
- $30.00
To cover these costs
250 units
$12,500.00 in sales
Each sale contributes $20.00 toward fixed costs. Same period, unchanged price and unit costs.
A cash scenario with its assumptions.
- Available cash
- $120,000.00
- Monthly cash in
- $20,000.00
- Monthly expenses
- $40,000.00
Keep cash flows flat
6.00 months
Until cash runs out at $20,000.00 monthly net burn.
Let cash receipts grow
Month 9
Monthly cash in first covers expenses, with cash still available.
Growth scenario: cash receipts rise 10.00% each month from month 2; expenses stay flat. An assumption to explore, not a forecast.