ตัวแปลงอัตรารายชั่วโมงเป็นโครงการ

The Hourly to Project Rate Converter helps freelancers and consultants transition from time-based to value-based pricing by converting hourly rates into project-based fixed pricing that properly accounts for time buffer (project overrun risk), overhead (your business operating costs), and profit margin. Hourly billing has fundamentally limited upside — the only ways to increase income are working more hours or raising rates. Project-based pricing rewards efficiency: if you complete a project in 30 hours that you priced at 40 hours, you keep the savings as additional margin. The calculator outputs the recommended project rate and effective hourly rate. The pricing formula stacks three multipliers on top of base hours-times-rate. Time buffer (typically 20%) covers scope creep, communication overhead, and project overruns — without it, every unexpected complication eats into your margin. Overhead (typically 15%) covers your business operating costs: software subscriptions, tools, accounting, taxes, retirement contributions. Profit margin (typically 20%+) is the markup above costs that creates the wealth-building component of self-employment income. Without explicit profit margin, you're essentially working at break-even. Most beginning freelancers quote project rates equal to hourly × hours, leaving zero room for the inevitable overruns and overhead. This is why so many freelancers feel they're 'working too hard for too little money' — they're undercharging by 50-100% relative to the project rate that would actually compensate them fairly. The calculator helps make the math explicit and gives you confidence to quote rates that reflect true value delivery.

Calkulon makes complex calculations simple — built for students and everyday problem-solvers.

1. 1Step 1 — Enter your standard hourly rate
2. 2Step 2 — Realistically estimate project hours (most underestimate by 30-50%)
3. 3Step 3 — Set buffer percentage (20% covers typical scope creep)
4. 4Step 4 — Set overhead percentage (15% covers tools, admin, taxes)
5. 5Step 5 — Set profit margin (20%+ creates wealth-building component)
6. 6Step 6 — Calculator outputs project rate and effective hourly rate

• !Quoting project rate equal to hourly × hours with no buffer/profit
• !Underestimating project hours by 30-50%
• !Forgetting overhead and self-employment taxes
• !Not increasing rates over time as expertise grows