Law of Cosines Calculator
Solve SAS & SSS Triangles
Calculate unknown sides and angles using the Law of Cosines. Perfect for SAS and SSS triangle cases.
Triangle Values
Use Cases
- • SSS: All three sides known
- • SAS: Two sides and included angle
Law of Cosines Formulas
c² = a² + b² - 2ab×cos(C)
b² = a² + c² - 2ac×cos(B)
a² = b² + c² - 2bc×cos(A)
Note
Law of Cosines works best for SSS and SAS cases. For other cases, use Law of Sines.
You Might Also Like
Explore more tools in this category
Dress Size Calculator
Calculate women's dress size and convert between US, UK, EU, and AU sizing systems
Capacitance Calculator
Calculate capacitance for parallel, series, plate capacitors, and energy storage
Heat Index Calculator
Calculate heat index and apparent temperature from temperature and humidity
Rainfall Volume Calculator
Calculate water volume from rainfall for rainwater harvesting
Crop Factor Calculator
Calculate crop factor and focal length equivalents for camera sensors
Air Density Calculator
Calculate air density based on temperature, pressure, and humidity
Wind Chill Calculator
Calculate wind chill temperature based on air temperature and wind speed
Carbon Footprint Calculator
Estimate yearly carbon emissions based on travel, electricity, and food habits
Fuel Cost Calculator
Calculate fuel costs for your trips and daily commutes