Productivity & Utilities Calculators
General-purpose utility calculators including percentage, date, time, unit conversion, and everyday math tools. Fast, free, and private.
4-Day Work Week Pay Calculator
Calculate how switching to a 4-day work week affects your hourly rate, annual salary, and true work-life balance value. Compare full pay, reduced pay, and productivity-based models.
AI Tool Time Saved ROI Calculator
Calculate the real ROI of AI tools like ChatGPT, Claude, Midjourney, and Copilot. See if your AI subscriptions are saving more time and money than they cost.
Date Calculator
Calculate the number of days, weeks, months, or years between two dates. Add or subtract days from any date. Find due dates, deadlines, and date differences instantly.
Age Calculator
Calculate your exact age or anyone's age in years, months, weeks, and days. Find out the next birthday countdown and how many days you've been alive.
Percentage Calculator
Calculate any percentage: what is X% of Y, percentage change between two numbers, percentage increase or decrease, and reverse percentage calculations. Multiple modes in one tool.
Time Calculator
Add or subtract time values, convert between time units, and calculate duration between two times. Handles hours, minutes, seconds, and time across midnight.
Unit Converter
Convert between all common units of measurement: length (miles to km), weight (lbs to kg), temperature (Fahrenheit to Celsius), volume, area, speed, and data storage.
Salary Increase Calculator
Calculate the exact dollar value of a salary raise by percentage or amount. See your new annual, monthly, and hourly pay after the increase. Plan salary negotiations.
AI Content Creation ROI Calculator
Calculate the return on investment (ROI) for your AI content creation tools. Compare time savings, cost reductions, and quality improvements to determine if AI tools are worth your investment.
AI Voice Over Calculator
Calculate and compare the cost of AI voice over versus hiring professional voice over artists. Estimate savings, quality trade-offs, and ROI for switching to AI voice synthesis for your content.
AI Image Generation Calculator
Calculate and compare the cost of AI image generation across providers like Midjourney, DALL-E, Stable Diffusion, and Firefly. Estimate your monthly spend and cost per image based on your volume needs.
AI Script Writing Calculator
Calculate time savings and cost reductions from using AI script writing tools for YouTube, TikTok, podcasts, and video content. Compare AI-assisted vs manual script writing productivity.
AI Video Creation Calculator
Calculate time savings and cost reductions from using AI video creation tools. Compare AI-generated video production costs against traditional video production workflows for content creators and businesses.
Content Syndication ROI Calculator
Calculate the ROI and incremental traffic from syndicating your content across platforms like Medium, LinkedIn, Flipboard, and news aggregators. Estimate additional reach, traffic, and revenue from content repurposing strategies.
AI Ethics Score Calculator
Assess the ethical implications of your AI-generated content. Score your content creation workflow for transparency, bias risk, disclosure compliance (FTC guidelines), and audience harm potential. Get actionable recommendations for responsible AI content creation.
Gamified Habit Loop & Streak Tracker
Track habits using Charles Duhigg's habit loop cue-routine-reward system. Calculate streak rewards, earn XP, level up, and measure financial impact over time.
AI Video B-Roll Automator ROI Calculator
Calculate the return on investment (ROI) of using AI tools to automatically find and insert B-roll. Compare manual editing time and cost against automation.
AI Podcast Audio Enhancer ROI Calculator
Calculate the return on investment (ROI) of using AI tools to clean and enhance podcast or video audio. Compare manual editing against automation.
AI Transcription File Size Cost Estimator
Estimate and compare AI transcription costs (Whisper, Google Cloud, AWS, Deepgram) based on your audio file size and format.
Descript Studio Sound vs Audio Engineer Cost Tool
Compare the cost of using Descript Studio Sound vs hiring a professional audio engineer. Calculate subscription costs, labor values, and flat fees.
Podcast Audio Enhancement Cost Optimizer
Optimize your budget for podcast and video audio enhancement. Compare hardware setup, plugin software licenses, subscriptions, and labor costs.
Voice Synthesis Character Cost Optimizer
Optimize text-to-speech costs. Compare character usage rates and voice cloning costs for ElevenLabs, Google Cloud, and Amazon Polly.
Whisper API Audio Transcription Cost Checker
Calculate and check standard OpenAI Whisper API transcription costs. Compare your usage savings against Rev, Otter.ai, and Sonix.
Fake Credit Card Number Generator & Validator
Generate Luhn-valid test credit card numbers for Visa, Mastercard, Amex, Discover, JCB, and Diners Club, and validate any card number's checksum format.
ChatGPT Plus vs API Cost Calculator
Compare your ChatGPT Plus, Team, or Pro subscription cost against pay-per-token OpenAI API pricing and find your exact breakeven usage point.
AI Subscription Stack Cost Comparator
Add up your ChatGPT, Claude, Gemini, and Midjourney subscriptions to see your total monthly and annual AI tool spend, broken down by service.
AI Image Generator Cost-Per-Image Comparator
Compare the real cost per image and monthly totals for Midjourney, GPT Image (DALL-E), and Stable Diffusion based on your monthly image volume.
AI Video Generator Cost-Per-Minute Comparator
Compare the cost per minute and monthly totals for Sora, Runway, Pika, and Google Veo AI video generators based on your monthly output needs.
Word & Character Counter
Count words, characters, sentences, and paragraphs in any text, and check it against social media limits for X, TikTok, Instagram, and YouTube.
QR Code Generator
Generate free custom QR codes for website links, link-in-bio pages, payment links, WiFi networks, contact cards, and more. Download as PNG instantly.
Random Password Generator
Generate strong, random passwords with custom length and character types. See the password strength, entropy, and possible combinations instantly.
GPA Calculator
Calculate your semester GPA and cumulative GPA by entering each course's letter grade and credit hours on the standard 4.0 scale.
AI Coding Assistant Cost Comparison
Compare the monthly and annual cost of Cursor, GitHub Copilot, Windsurf, and Sourcegraph Cody for your team, broken down by plan and number of developers.
LLM API Token Cost Calculator
Estimate your monthly and annual LLM API costs from request volume and average token counts, with built-in pricing for GPT, Claude, and Gemini models.
No-Code App Builder Cost Comparison
Compare the monthly and annual cost of Bubble, Webflow, Framer, and Softr plans side by side to find the most affordable no-code platform for your project.