Rate setting, invoicing, and tax planning calculators for freelancers.

Running your own business means managing rates, taxes, savings, and project budgets simultaneously. SpecWhale gives freelancers and independent contractors the essential financial calculators to price services correctly, plan savings, and evaluate project profitability — without a subscription.

Featured Tools for Freelancers & Self-Employed

Zero-upload, 100% private client-side calculators and converters.

Salary To Hourly Calculator

Convert an annual salary to an hourly rate based on your weekly work hours.

Business & Shopping · Calculator
Hourly To Salary Calculator

Convert hourly pay into annual salary from weekly hours and weeks per year.

Business & Shopping · Calculator
Savings Rate Calculator

Calculate savings rate from income and saved amount.

Finance · Calculator
Gross Profit Calculator

Calculate gross profit and gross margin from revenue and cost of goods sold.

Business & Shopping · Calculator
Project Burn Rate Calculator

Calculate the rate at which project budget is being spent and remaining runway.

Business & Shopping · Calculator
Revenue Per Employee Calculator

Calculate revenue per employee from annual revenue and headcount.

Business & Shopping · Calculator
ROI Calculator

Calculate return on investment from cost and gain.

Business & Shopping · Calculator