All Calculators & Tools
Free, accurate calculators for tax planning, financial decisions, regulatory compliance, and health awareness. All tools run entirely in your browser — no data is sent to any server.
No Tax on Tips & Overtime Calculator
Most PopularCalculate your savings under the OBBBA — tips, overtime premium, and senior citizen deductions. With IRS Schedule 1-A line items.
Airbnb & Short-Term Rental Tax Calculator
Estimate tax on Airbnb income. Includes 14-day rule, depreciation, expense deductions, QBI, and self-employment tax.
Appliance Total Cost of Ownership Calculator
Compare the true lifetime cost of appliances including energy, water, and maintenance. Standard vs ENERGY STAR presets.
Mobile Home Value Calculator
Estimate your manufactured home value using NADA-style depreciation with condition, land ownership, and regional adjustments.
EU PPWR Packaging Void Space Calculator
Check compliance with EU packaging void space limits. Get optimal box size recommendations for the 2026 and 2030 deadlines.
EU CBAM Carbon Tax Calculator
Estimate CBAM costs for importing cement, steel, aluminum, fertilizers, electricity, or hydrogen into the EU. 2026-2034 phase-in.
Microplastics Exposure Calculator
How much plastic are you consuming? Estimate weekly microplastic intake by diet, water source, and lifestyle. Science-based.
All calculations run locally in your browser. No personal data is collected or transmitted.