Free ideal gas law calculator. Solve for pressure, volume, temperature, or moles using PV=nRT. Includes unit conversions, gas constant values, and step-by-step solutions.
OmniCalculator.Space is your ultimate hub of 4,000+ smart calculators — from GPA to BMI, EMI to ROI. Every calculation, one space.
Free prism surface area calculator. Calculate surface area of triangular, rectangular, pentagonal, and hexagonal prisms. Includes formulas, lateral area, and step-by-step solutions.
Free Langmuir surface area calculator. Calculate specific surface area from adsorption data using Langmuir isotherm. Get monolayer capacity, K constant, and surface area in m²/g.
Free roof area calculator. Calculate roof square footage for shingles, metal roofing, or tiles. Supports gable, hip, flat, and shed roofs with pitch conversion.
Free surface area calculator for all 3D shapes. Calculate surface area of cube, sphere, cylinder, cone, pyramid, and more. Step-by-step formulas included.
Free 1040 tax calculator for 2026. Estimate your federal income tax, refund, and effective rate using updated tax brackets. No signup required.
Free timecard conversion calculator. Convert hours and minutes to decimal time for payroll. Calculate work hours, overtime, and gross pay instantly.
Free tip percentage calculator. Calculate tip amounts at any percentage, compare tip options, find what percentage you tipped, and split tips between guests easily.
Free sales tax and gratuity calculator. Calculate restaurant bills with tax and tip, split bills between guests, and determine tip amounts on pre-tax or post-tax totals.
Free tip out calculator for restaurants. Calculate tip pool distribution, server tip shares, percentage-based tipouts for bussers, bartenders, and hosts accurately.