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Friction Calculator

Science & Engineering

Static/kinetic friction + incline

Quick Answer

Friction Calculator: Static/kinetic friction + incline. Friction Calculator uses standard science & engineering formulas to compute accurate results instantly.

kg
N
Friction force
25.00 N
At rest (static friction matches push)
Normal force N98.0 N
Max static friction39.2 N
Friction25.0 N
StateAt rest

Calculation steps

  1. 1Normal force N = m×g = 10 × 9.8 = 98.00 N
  2. 2Max static friction = μs×N = 0.4 × 98.00 = 39.20 N
  3. 3Push 25 N ≤ 39.20 N → stays at rest; static friction equals push = 25.00 N

Typical friction coefficients

Surfacesμsμk
Steel — steel (dry)0.150.09
Wood — wood0.40.2
Tire — dry asphalt0.70.5
Tire — wet road0.40.3
Leather — metal0.60.3
Ice — ice0.030.02
Teflon — steel0.040.04
Static friction is adaptive: it only equals μs×N at the verge of slipping — below that it matches the applied force. Kinetic friction is usually smaller than max static friction, which is why objects "jerk" when they start moving. Friction is (to first approximation) independent of contact area and speed.

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How to Use

  1. Enter known quantities: fill values and confirm units in the Friction Calculator.
  2. Instant solution: unknowns solve live with the formula shown transparently.
  3. Use constant/material tables: standard physical constants and material data are listed on this page.
  4. Compare conditions: change inputs to compare scenarios.

Key Points

  • Friction Calculator is a free online science & engineering tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Static/kinetic friction + incline.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Friction Calculator formula

Friction Calculator uses standard science & engineering formulas to compute accurate results instantly.

FAQ

How do I use the Friction Calculator?
Open the page and fill in the input fields — results update automatically. Static/kinetic friction + incline.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

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Source & Updates

Based on CODATA recommended constants and standard physics formulas. Last updated: 2025-07

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Friction Calculator[EB/OL]. https://www.yijiansuan.com/en/c/science/friction

Results provided by this tool are for reference only and do not constitute professional advice.