Work calculators for hours, pay and invoices

Handle routine work calculations with visible formulas and practical cautions. Pay, leave and invoice rules differ, so each result is designed to be checked against the correct local source.

Choose a tool

Calculate hours and gross pay

Handle overnight shifts, unpaid breaks, overtime thresholds and editable hourly rates.

Estimate leave and loading

Plan NHS annual leave in hours or apply an Australian casual loading percentage to a base rate.

Create a printable invoice

Build itemised totals with discounts and tax, then save the finished invoice as a PDF.

Choose the exact task

6 free work tools

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Work Hours and Overtime Calculator

Calculate paid hours, overtime and estimated gross pay for a work shift.

Open ShiftPay▤

Free Invoice Generator and Printable PDF

Create a clean invoice in your browser and save it as a printable PDF.

Open InvoiceLiteN

NHS Annual Leave Calculator

Estimate Agenda for Change annual leave and public holiday entitlement in hours for full-time or part-time staff.

Open NHSLeaveAU

Australian Casual Loading Calculator

Calculate a loaded casual hourly rate and weekly gross pay using an editable loading percentage and overtime inputs.

Open CasualPay AU$

Loan Payment and Interest Calculator

Estimate monthly payments, total interest and payoff cost for a fixed-rate loan.

Open LoanMap◑

Bill Split Calculator With Tip & Tax

Split a restaurant bill, tip and tax fairly between any number of people.

Open SplitMate

The ToolOrbit difference

Useful first. Private by default.

Use every current tool without creating an account. Tool contents are processed in your browser, and file tools do not upload selected files to ToolOrbit to complete the task.

Read how privacy works

Common questions

Before you start

Are pay calculations exact payroll figures?

No. They are gross estimates before tax, deductions and rules that depend on the applicable contract, award or law.

Where is a saved invoice template stored?

When you choose to save one, the template stays in local browser storage on that device rather than a ToolOrbit account.