Before you can price a product or service, you need to know your costs to provide it. This CDB calculator is one tool to help you get a handle on those costs. But it's only as accurate as your inputs, which can be hard to estimate. Err on the high side, since unexpected things can catch up with you, and as you bill more, your expenses almost surely will increase. As high as totals from this calculator may look, experience will probably prove them low.
The calculator was designed by The National Press Photographer's Association, but a little creative thinking will make it a useful exercise for any freelance professional.