Calculator Guides Australia

Plain-English guides that explain how to use the finance and fitness calculators on Tools by Layna Active.

GST Calculator Australia: Add GST, Remove GST and Avoid Pricing Mistakes

Learn how GST works in Australia, how to add GST, how to remove GST and when to use a GST calculator for invoices, pricing and quotes.

BMI and TDEE calculators answer different fitness questions. Learn when to use each one for weight loss, maintenance and performance goals.

Learn how compound interest works and how regular deposits can change long-term savings growth.

Use protein and macro calculators to estimate daily targets for fat loss, muscle growth and training recovery.

Learn the difference between profit margin and markup, with simple examples for Australian small business pricing.

Learn how running pace works and how to estimate finish times for 5K, 10K, half marathon and marathon training.