UK Marriage Allowance Calculator 2025/26 — Are You Eligible & How Much?
Free UK Marriage Allowance calculator. Check your eligibility, see exact annual saving (up to £252) and backdated savings (up to £1,008). 2025/26 HMRC rates.
UK IR35 Calculator 2025/26 — Inside vs. Outside Take-Home
Free UK IR35 calculator. Side-by-side comparison of contractor take-home pay inside IR35 (umbrella/PAYE) vs. outside (limited company). Day rate, expenses, Corporation Tax, dividends — 2025/26 HMRC rates.
UK Side-Hustle Tax Calculator 2026/27 — What You Really Owe HMRC
Free UK side-hustle tax calculator for 2026/27. Estimate income tax and Class 4 National Insurance on Vinted, Etsy, freelance, Airbnb, or other side income on top of your salary.
LLM Token-to-Cost Calculator (2026) — GPT-4o, Claude, Gemini & 13 More Models
Convert words, characters, or token counts to API dollar cost across 16 LLMs — GPT-4o, Claude Sonnet 4, Gemini, Llama, DeepSeek and more. Paste a prompt or scale to millions of calls.
AI Subscription Cost Calculator — How Much Are You Really Spending on ChatGPT, Claude, Cursor & More?
Reveal how much your AI subscriptions really cost each month, year, and over five years, then copy a shareable AI stack score for ChatGPT, Claude, Cursor, Midjourney, Perplexity, and more.
Engine Torque Calculator: A Complete Guide
Engine Torque Calculator Pro 🌓 Toggle Theme Unit System Imperial (HP, lb-ft)Metric (kW, Nm) Engine Profile Custom ConfigurationHigh-Performance V8Sports V6Economy I4Heavy-Duty Diesel Power Output (HP) Engine Speed (RPM) Environmental Factor […]