Embed CalcOnce Calculators
Add professional, responsive calculators to your website in seconds. Free to use, no signup required.
How It Works
1
Choose a Calculator
Browse our collection of 30+ calculators for construction, finance, health, and everyday use.
2
Copy the Embed Code
Click on any calculator below to get the embed code. Choose from multiple size options.
3
Paste Into Your Site
Add the iframe code to your HTML, WordPress, Webflow, or any website builder.
Available Calculators
Construction10
🧱🪵🎨🔲📐🌿⛰️🏠🚧🧊
Concrete Calculator
Estimate cubic yards of concrete needed
Lumber Calculator
Board feet & framing estimates
Paint Calculator
Gallons needed for your project
Tile & Flooring
Square footage with waste factor
Drywall Calculator
Sheets, mud & tape estimates
Mulch Calculator
Cubic yards for landscaping
Gravel Calculator
Tons & cubic yards needed
Roofing Calculator
Squares & shingles estimate
Fence Calculator
Posts, rails & materials
Insulation Calculator
R-value & material needs
Finance13
🏦🏡📈💵🍽️🎯📊💸💰🎉🏖️🚗⛽
Loan Calculator
Monthly payments & total interest
Mortgage Calculator
Home loan payment breakdown
Compound Interest Calculator
Watch your money grow over time
Salary Converter
Annual ↔ hourly ↔ monthly breakdown
Tip Calculator
Split bills & calculate tips fast
ROI Calculator
Return on investment percentage
Amortization Calculator
Loan schedule & extra payments
Inflation Calculator
Purchasing power over time
Paycheck Calculator
Net pay after taxes
Debt Payoff Calculator
Payoff timeline & interest savings
Retirement Calculator
Project your retirement savings
Auto Loan Calculator
Car payment & total cost
Gas Mileage Calculator
MPG, cost per mile & efficiency
Health & Lifestyle2
Everyday6
🔬📚%📏📅🏷️
Scientific Calculator
Advanced math with trig & logarithms
Grade Calculator
Weighted grades & what you need
Percentage Calculator
Percentages, changes & comparisons
Square Footage Calculator
Area for any shape in sq ft
Date Calculator
Days between dates & add/subtract
Discount Calculator
Sale price & savings instantly
Customization Options
Size Options
- -Small (320x450): Perfect for sidebars
- -Medium (400x500): Balanced for most uses
- -Large (500x600): Full-featured display
- -Responsive (100%): Adapts to container width
Features
- -Clean, minimal design without ads
- -Responsive and mobile-friendly
- -Fast loading with lazy load support
- -Discrete "Powered by CalcOnce" branding
Terms of Use
By embedding CalcOnce calculators on your website, you agree to the following terms:
- Free for all uses: You may embed our calculators on personal, commercial, or educational websites at no cost.
- Attribution required: The "Powered by CalcOnce" link must remain visible and clickable. Do not modify, remove, or obscure the branding.
- No modifications: Do not attempt to modify, hack, or reverse-engineer the embedded calculators.
- No framing restrictions: You may not place the embed inside frames that prevent users from accessing CalcOnce.
- Accuracy disclaimer: Calculations are for informational purposes only. CalcOnce is not responsible for decisions made based on calculator results.
- Service availability: We strive for 99.9% uptime but do not guarantee uninterrupted service.
We reserve the right to update these terms at any time. Continued use of embeds constitutes acceptance of any changes.