Showing 58 calculators
pH Calculator - Free Online pH, pOH, H+ and OH- Calculator
Calculate pH from H+ concentration or vice versa. Also compute pOH and OH- values instantly. Essential tool for chemistry students and labs.
Ideal Gas Law Calculator - Free Online PV=nRT Calculator
Calculate pressure, volume, moles, or temperature using the ideal gas law PV=nRT. Supports multiple units with step-by-step solutions.
Profit Margin & Markup Calculator - Free Online Sales Calculator
Calculate profit margins, markups, selling prices, and cost prices instantly. Essential tool for sales executives and business owners.
Ohm's Law Calculator - Free Voltage, Current, Resistance & Power Calculator
Calculate voltage, current, resistance, and power using Ohm's Law. Essential electrical engineering tool with interactive formulas and circuit examples.
Thread Pitch Calculator - Free Online Thread Specification Calculator
Calculate thread specifications including pitch diameter, thread depth, and dimensions for metric and imperial threads with our professional calculator.
Wire Gauge Calculator - Free Online AWG & mm² Wire Size Calculator
Calculate the correct wire gauge (AWG/mm²) for your electrical project based on current, length, and voltage drop. Essential tool for electrical safety.
Triangle Area Calculator - Free Online Geometry Calculator
Calculate triangle area using multiple methods: base-height, three sides (Heron's formula), or coordinates. Perfect for students and educators.
Circle Calculator - Free Online Circle Area & Circumference Calculator
Calculate circle area, circumference, diameter, and radius instantly. Free online circle calculator with visual diagram and step-by-step solutions.
Rectangle & Square Calculator - Free Online Area, Perimeter & Diagonal Calculator
Calculate rectangle and square area, perimeter, and diagonal length instantly. Free online calculator with visual diagrams and step-by-step solutions.
Pythagorean Theorem Calculator - Free Online Right Triangle Calculator
Calculate missing sides of right triangles using the Pythagorean theorem. Find hypotenuse or legs with our free visual calculator and step-by-step solutions.
Polygon Area Calculator - Free Online Regular Polygon Calculator
Calculate area and perimeter of regular polygons (pentagon, hexagon, octagon, etc.). Free calculator with visual diagrams and formulas.
3D Volume Calculator - Free Online Cube, Sphere, Cylinder & Cone Calculator
Calculate volume and surface area of 3D shapes including cubes, spheres, cylinders, cones, and pyramids. Free calculator with visual diagrams.