Free Calculators · 2026
Free Marketing Calculators
Three powerful calculators to help you project growth, calculate Gumroad revenue, and estimate your Pinterest reach — all free, no signup required.
🧮 Compound Interest & Growth Calculator
💡 How to use this
Enter your starting amount, expected annual return, and how long you plan to invest. Add monthly contributions to see how consistent saving accelerates your growth.
Future Value
$0.00
Total value after compound growth
Total Invested
$0.00
Your principal + all contributions
📊 Breakdown
Interest Earned$0.00
Return on Investment0%
Monthly Growth (avg)$0.00
How compound growth works
- Your initial investment earns interest in year 1
- That interest gets added to your principal
- Year 2 earns interest on the larger amount
- Monthly contributions accelerate this effect dramatically
💰 Gumroad Revenue Calculator
💡 Gumroad fees in 2026
Gumroad charges a flat 10% on all sales. Payment processing (Stripe) adds ~2.9% + $0.30 per transaction. This calculator shows your true net earnings after all fees.
Monthly Net Revenue
$0.00
After all Gumroad & processing fees
Annual Net Revenue
$0.00
Projected yearly earnings
💰 Revenue Breakdown
Gross Revenue (monthly)$0.00
Gumroad Fees (10%)$0.00
Processing Fees$0.00
Net Per Sale$0.00
Effective Take Rate0%
Maximize your Gumroad earnings
- Price products at $27, $47, $97 — proven price points
- Bundle products to increase average order value
- Add an upsell — even 20% uptake doubles revenue
- Build an email list to drive repeat purchases
📌 Pinterest Reach & Engagement Calculator
💡 Pinterest in 2026
Pinterest reaches 500M+ monthly active users. Pins have an average lifespan of 3–6 months — far longer than any other social platform. Consistent pinning compounds over time.
Estimated Monthly Reach
0
Unique accounts your pins could reach
Estimated Monthly Engagement
0
Saves, clicks, and repins combined
📌 Pinterest Breakdown
Est. Monthly Impressions0
Engagement Rate0%
Est. Monthly Click-throughs0
Est. Monthly Saves0
Viral Reach (repins)0
Grow your Pinterest reach faster
- Pin 5–10× per day using a scheduler like Tailwind
- Use vertical images (2:3 ratio) — they get 60% more saves
- Add keywords to pin titles and descriptions for SEO
- Link every pin to a landing page with an email capture