All Resources
Conversion Calculator
Use the measurement conversion calculator to convert units from one measurement to another. Pick a category, choose your input and output units, and enter a value — it converts instantly in both directions.
12 categories, from Area to Volume — pick one below.
Enjoying this resource?
This calculator is free for everyone — but it’s just one of many tools available. Members of the American Purchasing Society enjoy a number of additional benefits, including:
Salary & Benchmarking Reports
Annual data on purchasing salaries and department performance.
Professional Certification
Discounts and eligibility toward CPP, CPPM, and other credentials.
Course & Book Discounts
Member pricing on online courses, seminars, and publications.
Free Consulting
Direct access to purchasing experts for advice on the job.