Free Online Calculators for Every Need
🧮 Professional Calculators at Your Fingertips
Access our comprehensive collection of free online calculators designed for professionals, students, and everyday users. From construction and real estate to health and finance, our calculators provide accurate, instant results for all your calculation needs.
Install on Your Website#
Embed any calculator on your site with a simple iframe. Open a category below and copy the embed snippet under “Embed These Calculators”, or embed the full page:
<iframe
src="https://strtly.com/calculators/personal-finance/?embed=1"
width="100%"
height="900"
style="border:0;max-width:100%"
></iframe>
<div style="text-align:right;font:400 12px/1.4 system-ui;margin-top:4px">Calculators by <a href="https://strtly.com/calculators/" target="_blank" rel="noopener">Strtly</a></div>
Replace the URL with any calculators category and optionally add a hash anchor to jump to a specific tool.
For a full guide (including auto‑resize), see: How to Embed Strtly Calculators
Construction & Trade
Calculate concrete yardage, rafter lengths, and other construction essentials
Explore CalculatorsReal Estate Investment
Calculate ROI, HELOC potential, and rental property returns
Explore CalculatorsSmall Business Financial
Calculate hourly rates, pricing strategies, and business finances
Explore CalculatorsPersonal Finance
Calculate emergency funds, debt payoff strategies, and savings goals
Explore CalculatorsEducational & Academic
Calculate GPA with credit hours, student loan payments, and more
Explore CalculatorsTrade & Professional Services
Calculate HVAC loads, plumbing pipe sizing, and trade formulas
Explore CalculatorsWhy Choose Our Calculators?
✅ Accurate Results
All calculators are built with precision and tested for accuracy across various scenarios.
📱 Mobile-Friendly
Fully responsive design works perfectly on desktop, tablet, and mobile devices.
🚀 Instant Results
Get immediate calculations without waiting for page loads or external dependencies.
🆓 Always Free
No registration required, no hidden fees, and no limitations on usage.