Geometry & Engineering Calculators

Calculators for geometric shapes and engineering principles.

Estimate the volume and number of pre-mixed concrete bags for slabs, footers, or round posts.

Find the missing angles of a triangle when you know three sides (SSS) or two sides and an included angle (SAS).

Easily convert voltage (V) and current (Amps) to electrical power in watts (W).

Calculate the resulting torque by entering the force and distance (lever arm length).

A versatile circle calculator to find area, circumference, diameter, and radius from any known value.

Calculate a triangle's area and perimeter using Base & Height, 3 sides (Heron's), or Side-Angle-Side.

A free online calculator to find the area and perimeter of a rectangle. Just enter length and width.

Calculate the volume, lateral area, base area, and total surface area of a cylinder.

Quickly calculate the volume and surface area of a sphere by providing its radius.

Easily calculate the volume, slant height, and total surface area of a cone from its radius and height.

Easily solve for the missing side of a right-angled triangle using the a² + b² = c² formula.

A free trig calculator to find the sine, cosine, tangent, and their inverses for any angle.

A simple tool to find the maximum deflection of a cantilever beam with a point load at the end.

An easy-to-use Ohm's law calculator for voltage (V), current (I), resistance (R), and power (P).

Decode 4-band resistor color codes to instantly find the resistance value and tolerance.

Calculate the charge and current in a charging RC (resistor-capacitor) circuit at a specific time.