Free online tools that actually do the math
No sign-up. No upload. Everything runs in your browser — your numbers never leave your device. Built for the 2025/2026 rules that generic calculators get wrong.
2025 OBBBA Tax Deduction Calculators
No Tax on Overtime Calculator
Only the premium "half" of time-and-a-half is deductible. Model the caps and phase-out correctly.
Tier 1No Tax on Tips Calculator
Up to $25,000 deduction on qualified tips — FICA and state tax still apply. See your real take-home.
Tier 1Car Loan Interest Deduction
Up to $10,000/yr interest deduction with eligibility checks + full amortization schedule.
Tier 1OBBBA Savings Suite
Tips + overtime + car loan + senior deductions combined into one take-home-impact estimate.
Health & Fitness
GLP-1 Protein & Calorie Calculator
Muscle-preservation protein and calorie targets while on Ozempic / Wegovy / Mounjaro.
Tier 2India In-Hand Salary Calculator
New tax regime (FY 2025-26) take-home pay from CTC, with EPF and standard deduction.
Developer & AI Tools
LLM API Cost Calculator
Paste text, count tokens in-browser, compare price across Claude, GPT, Gemini and more.
Tier 2JPEG XL Converter
Convert JXL ⇄ JPG / PNG entirely in your browser. Files never get uploaded.
Tier 2Connections & Strands Helper
Graduated hints and a grouping solver for today's NYT puzzles — without spoiling it.
Tier 2llms.txt Generator & Validator
Generate a spec-compliant llms.txt for your site, or validate an existing one.
Why these tools?
Most online calculators are thin widgets that haven't been updated for 2025/2026 rules. Each tool here pairs the calculator with a worked example, the exact methodology, and an FAQ — so you can trust the number and understand how it was derived. Everything is client-side: open the page, get an answer, and nothing about your finances or files is sent to a server.