Make data-driven decisions about your author business with 30 essential calculators. From KDP royalties to full-time income planning, we've got you covered.
Publishing is a business, and every business decision should be backed by data. We built these calculators because we believe every author deserves access to professional-grade financial tools—without paying for expensive software or spreadsheets.
Whether you're calculating your first KDP royalty or planning your path to full-time authorship, these tools help you make confident decisions about pricing, marketing spend, translations, and revenue projections.
No signup, no paywall, no credit card. Just instant access to all 30 calculators whenever you need them.
Make decisions based on real numbers, not guesswork. Optimize pricing, ad spend, and investment with confidence.
Built by authors, for authors. Every calculator solves a real problem we've faced in our own publishing journey.
Calculate net royalties for eBooks and print books across all Amazon marketplaces. Factor in delivery costs, VAT, and pricing tiers.
Most PopularCalculate total revenue across eBook, print, and audiobook formats. Plan your multi-format publishing strategy.
EssentialCompare exclusive (40%) vs non-exclusive (25%) royalty rates. Project audiobook earnings on Audible.
AudiobookCalculate average revenue per reader across your book series. Factor in read-through rates and multiple books.
Series AuthorsCalculate Kindle Unlimited earnings based on KENP pages read. Current rates: $0.0040-$0.0050/page.
KUPlan your path to full-time writing. Calculate books needed and timeline to replace your day job income.
Career PlanningCalculate Return on Ad Spend for Amazon Ads, Facebook, BookBub. Track profitability across platforms.
AdvertisingAmazon-specific ACOS (Advertising Cost of Sale). Lower is better—track your ad efficiency percentage.
Amazon AdsCalculate BookBub Featured Deal profitability. Factor in direct sales plus series read-through value.
PromotionsCalculate pre-order campaign profitability. Factor in marketing spend and launch day visibility boost.
LaunchCalculate subscriber lifetime value. Determine how much each email subscriber is worth over time.
Email MarketingCalculate KDP printing costs for paperbacks and hardcovers. B&W, color, and premium options.
Print BooksPlan complete launch costs including editing, cover design, marketing, and production expenses.
PlanningCalculate optimal cover investment based on expected revenue. Compare budget, mid-range, and premium options.
DesignCalculate ghostwriting investment ROI and breakeven timeline. Plan profitability for ghostwritten books.
InvestmentCalculate sales needed to recover publishing costs. Know your breakeven point before you launch.
Financial PlanningA/B test different price points. Compare total revenue at various prices to find your optimal pricing.
OptimizationCalculate optimal bundle pricing with typical 30-50% discount. Maximize box set revenue.
BundlesAdvanced box set analysis. Compare individual vs bundle revenue to find optimal strategy.
AdvancedCalculate if making Book 1 free is profitable. Factor in series read-through and conversion rates.
Series StrategyCalculate wholesale pricing for bookstore distribution. Analyze retail margins and profitability.
DistributionBreakeven analysis for single-language translation. Typical costs: $0.08-$0.15/word.
InternationalMulti-language translation analysis. Calculate ROI for publishing in multiple international markets.
Global StrategyACX production investment analysis. Calculate breakeven timeline for audiobook production costs.
Format ExpansionCompare profitability across multiple pen names. Calculate total revenue from different author brands.
Multi-brandTrack review acquisition rate. Success threshold: ≥0.5 reviews per day.
Social ProofAdvanced review growth analysis. Project future review count based on sales and review rates.
ForecastingProject email list growth over time. Factor in subscriber acquisition rate and churn.
List BuildingCalculate timeline to profitability. Know exactly when your book investment will pay off.
TimelineCalculate optimal release schedule for maximum revenue. Plan your series publication timeline.
Series PlanningCalculate your total catalog value, identify underperforming books, and see your complete income picture. Professional portfolio analysis for serious authors.
AdvancedShould you take that traditional publishing advance or go indie? Compare traditional vs indie earnings over 10 years with earn-out analysis.
AdvancedTrack multi-campaign performance, calculate ACOS, compare channels, and optimize your marketing budget. Professional attribution for authors.
AdvancedCompare rapid release vs spaced releases. Model cash flow, cumulative sales, and profitability across your entire series over 24 months.
AdvancedProject 30 years of earnings from books, courses, speaking, and more. See if full-time authorship makes financial sense with comprehensive career modeling.
Advanced