Scientific Calculator
Full scientific calculator with sin, cos, tan, log, ln, powers, roots, and more.
- 100% free
- Private in browser
- No signup
- No watermarks
Result
2.70710678119
log(100) = 2
sin(45) = 0.7071067811865475
= 2.70710678119
Rate this tool
Be the first to rate — helps others and improves this page.
About Scientific Calculator
Scientific Calculator on TheToolss supports all standard and advanced math operations including trigonometry, logarithms, exponents, factorials, and more.
How to use Scientific Calculator
- Type your math expression or use the buttons.
- Get instant results with calculation steps.
- Toggle between degrees and radians.
Key features
- sin, cos, tan and inverses
- log, ln, exponents
- Square root, cube root, nth root
- Factorial, absolute value
- Degrees/radians mode
- Calculation history
Frequently asked questions
- Does it support complex expressions?
- Yes! You can type multi-step expressions like sin(45) + log(100) * 2.
- What do I need to enter?
- Just Expression. Every field has a sensible default you can start from.
- Is my data uploaded anywhere?
- No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
- Does it work on a phone?
- Yes. The layout adapts to small screens and needs no app or signup.
- Is Free Scientific Calculator Online free?
- Yes. Free Scientific Calculator Online on TheToolss is free to use with no signup required for the core workflow.
Related In-Depth Guides
Learn practical workflows, real-world examples, and expert tips in our comprehensive guides:
Home Remodeling Material Takeoff Guide: Tile Grout, Drywall Mud & Kitchen Cabinet Runs
Professional contractor takeoff formulas for interior renovations. Accurately estimate tile grout bags, drywall joint compound for Level 4 finishes, and modular kitchen cabinet spacing.
How to Size a Home Emergency Generator: Running vs Surge Watts & Propane Runtime
Complete electrical guide to calculating running watts, motor startup surge wattage, transfer switches, and fuel consumption for winter storms and outages.
Patio Paver & Retaining Wall Installation Guide: Base Gravel, Sand & Block Calculations
Avoid settling, cracking, and water pooling. Step-by-step math for paver patterns, 4-6 inch aggregate base, 1-inch bedding sand, and drainage gravel.