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Free online calculators, business tools, AI economy analyzers, and file converters. Everything runs in your browser — no uploads, no accounts.
Categories
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Tax Calculators
Income tax, self-employment tax, sales tax, and more for individuals and businesses.
33 toolsPayroll Calculators
Paycheck estimators, employer cost calculators, and overtime tools.
24 toolsPricing Calculators
Markup, margin, hourly rate, and project pricing tools.
13 toolsBusiness Planning
Break-even analysis, startup cost estimators, and ROI calculators.
23 toolsFreelancer Tools
Rate calculators, invoice generators, and time tracking tools for freelancers.
9 toolsE-Commerce Calculators
FBA fees, shipping cost, profit margin, and dropshipping calculators.
10 toolsReal Estate Calculators
Mortgage, rental yield, property tax, and closing cost calculators.
10 toolsAI Economy Tools
AI cost calculators, ROI tools, and job impact analyzers.
22 toolsTopic Hubs
Curated multi-step tool paths for complete workflows.
Tax and Payroll Optimization Hub
Paycheck, withholding, tax planning, and reimbursement workflows for recurring money operations.
Business and AI Economics Hub
Cost, ROI, and automation decision workflows for AI adoption and growth planning.
Conversion and Data Pipelines Hub
High-demand document, media, and data conversion flows for repeat utility usage.
Freelancer Unit Economics Hub
Pricing, margin, tax, and workload tools for independent operators.
Browse by Country
Tax, payroll, and business tools tailored to your country.
Tool Collections
Deep toolsets built around high-demand workflows.
Payroll & Tax
Paychecks, bonus withholding, overtime, and employer cost planning tools.
AI Economics
ROI tools for automation decisions, chatbot rollouts, and cost benchmarking.
E-Commerce Margins
Marketplace-specific tools for Amazon, Etsy, eBay, and Shopify profit visibility.
Unit Economics
CAC, LTV, ROI, and SaaS metrics tools for pricing strategy and growth.
Popular Tools
The most-used tools across payroll, AI, e-commerce, and conversions.
Paycheck Calculator
Estimate take-home pay after federal taxes, state taxes, and payroll deductions for hourly or salary income.
Use tool →US Self-Employment Tax Calculator
Calculate your US self-employment tax (Social Security + Medicare) based on your net earnings, including the 92.35% taxable base and deductible half.
Use tool →AI vs Human Cost Calculator
Compare the cost of completing a task with AI tools versus hiring a human. Includes API costs, time savings, and ROI.
Use tool →AI Model Comparison Table
Compare top AI model providers in one up-to-date table covering flagship models, API access, context, and links to official docs.
Use tool →Creator & Culture Tools
Short-form hooks, meme ideation, slang translation, and content quality tools.
Short-Form Video Hook Generator
Generate high-retention hooks and script beats for TikTok, Reels, and YouTube Shorts.
Use tool →Viral Hashtag Generator
Create platform-specific hashtag bundles tuned to trend intent, niche relevance, and discovery.
Use tool →Meme Idea Generator
Generate meme-ready concept packs by format and vibe for fast posting across major social platforms.
Use tool →Newest Tools
Recently published tools.
AI Photo to 3D Model Generator
Transform any photo into an interactive 3D model using AI depth estimation — runs entirely in your browser. Export as STL for 3D printing, OBJ for Blender, or GLB for the web.
Use tool →DNA/RNA Base Pair Converter
Convert DNA sequences to complementary DNA, mRNA, tRNA anticodons, and amino acid chains. See codon-by-codon breakdown with GC content and base composition.
Use tool →Punnett Square Generator
Generate Punnett squares for monohybrid and dihybrid crosses. See genotype and phenotype ratios with a visual grid and probability bars.
Use tool →Hardy-Weinberg Equilibrium Calculator
Calculate allele and genotype frequencies using the Hardy-Weinberg equation. Supports allele frequencies, phenotype counts, and genotype counts with chi-square equilibrium testing.
Use tool →100%
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Guides, Widgets & Benchmarks
Go deeper with long-form guides, embeddable widgets, and benchmark datasets.
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