Free calculator and tool collection
PenniTools brings commonly used calculations into one place so you can work out numbers quickly without installing an app. The collection includes financial calculators such as EMI, GST, discount and percentage tools; vehicle tools for mileage, fuel, EV range and trip costs; and construction calculators for square feet, tiles, paint, concrete and materials.
You can also find carpenter measurements, document and PDF utilities, image tools, work and productivity calculators, education tools and everyday converters. Open a tool, enter your measurements or values, and review the result directly in your browser.
Popular calculators
For travel planning, try the Trip Cost Calculator. For construction measurements, use the Square Feet Calculator or Tile Calculator. For money calculations, visit the Finance Calculators collection.
Related PenniTools pages
Read the PenniTools Guides for practical explanations, or return to the PenniTools homepage to browse the main categories.