Geometry & Engineering Calculators
Calculators for geometric shapes and engineering principles.
Concrete Slab Calculator
Estimate the bags of concrete needed for a slab, footer, or posts.
Triangle Angle Calculator
Find unknown angles in a triangle given three sides (SSS) or two sides and an angle (SAS).
Voltage to Watts Calculator
Convert voltage (V) and current (A) to power in watts (W).
Circle Calculator
Calculate the area and circumference of a circle.
Triangle Area & Perimeter
Calculate the area and perimeter of a triangle.
Rectangle Area & Perimeter
Calculate the area of a rectangle or square.
Cylinder Volume Calculator
Calculate the volume of a cylinder.
Sphere Volume & Surface Area
Calculate the volume and surface area of a sphere.
Cone Volume Calculator
Calculate the volume of a cone.
Pythagorean Theorem Calculator
Solve for sides of a right triangle.
Trigonometry Calculator
Calculate sin, cos, tan, and more.
Beam Deflection Calculator
Calculate the deflection of beams.
Torque Calculator
Calculate torque from force and distance.
Ohm’s Law Calculator
Calculate voltage, current, and resistance.
Resistor Color Code Calculator
Decode 4-band resistor color codes.
Capacitor Charge Calculator
Calculate capacitor charge and discharge times.