About Baike Calc
Baike Calc is a free online toolkit with 198 calculators and converters across 19 categories, including math, finance, health, image processing, engineering, and networking. Every calculation runs locally in your browser: nothing you type is uploaded to a server, and no account is required to use any tool. Each tool page includes step-by-step instructions, an explanation of the underlying formula, and a set of frequently asked questions, so you can understand how a result is derived instead of just reading a number. Whether you are a student, an engineer, a finance professional, or someone who just needs a quick figure, you will find a tool that fits.
🖼️ Image & Video Processing Image & Video Tools · New
Video Watermark Remover
Upload a video, select the watermark area. In-browser AI processing. Supports MP4 / MOV / WebM. Use our free online calculator for fast, accurate results with no registration required. Simple, private, and ready to use in seconds.
Image Watermark Remover
Select the watermark area. AI-based smart removal. Supports JPG / PNG / WEBP. Use our free online calculator for fast, accurate results with no registration required. Simple, private, and ready to use in seconds.
ICO Icon Converter
Convert images to .ico with multi-size packaging (16/32/64/128/256px). Use our free online calculator for fast, accurate results with no registration required. Simple, private, and ready to use in seconds.
Image Format Converter
PNG / JPG / WEBP / BMP / GIF batch conversion. Use our free online calculator for fast, accurate results with no registration required. Simple, private, and ready to use in seconds.
Image Compressor
Lossy / lossless compression. Reduce file size while preserving quality. Use our free online calculator for fast, accurate results with no registration required. Simple, private, and ready to use in seconds.
Video Compressor
Adjust resolution & bitrate to quickly shrink video file size. Use our free online calculator for fast, accurate results with no registration required. Simple, private, and ready to use in seconds.
Image Upscaler
AI super-resolution — make blurry images clear again. Use our free online calculator for fast, accurate results with no registration required. Simple, private, and ready to use in seconds.
Image to PDF
Merge multiple images into a single PDF file. Use our free online calculator for fast, accurate results with no registration required. Simple, private, and ready to use in seconds.
Video to GIF
Upload a video, adjust FPS and width, and convert it to an animated GIF in one click. Use our free online calculator for fast, accurate results with no registration required. Simple, private, and ready to use in seconds.
Browse by category
198 tools across 19 categories. Open any category to see every calculator in it, with explanations.
Color
1 tools
Color conversion and palettes: HEX, RGB and HSL, plus contrast and difference checks.
Cooking
4 tools
Kitchen unit conversion, recipe scaling and oven temperature conversion.
Automotive
4 tools
Car math: fuel consumption, tire sizes, service intervals and auto loans.
Chemistry
6 tools
Chemistry: molar mass, solution preparation, concentration and stoichiometry.
Crypto
4 tools
Cryptocurrency conversion, mining profitability estimates and hashrate math.
Data
5 tools
Data size and bandwidth: storage units, download time and transfer throughput.
Date & Time
9 tools
Date and time: day intervals, working day counts and timezone conversion.
Engineering
6 tools
Engineering: structural loads, material strength and hydraulic parameters.
Finance
25 tools
Finance: loan repayment, compound interest, investment returns and taxes.
Real Estate
3 tools
Real estate: monthly mortgage payments, property valuation and ROI analysis.
Health
28 tools
Health: BMI, body fat percentage, basal metabolic rate and daily calorie needs.
Infrastructure
10 tools
IT infrastructure: server capacity planning, virtualization resources and cost estimates.
Math
43 tools
Math: percentages, fractions, statistics, geometry and number base conversion.
Music
1 tools
Music: tempo, note durations and pitch to frequency conversion.
Network
6 tools
Networking: subnetting, IP address planning and CIDR conversion.
Photo
24 tools
Photography: depth of field, exposure, equivalent focal length and resolution.
Physics
1 tools
Physics: speed, energy, force and common unit conversions.
Video
8 tools
Video: bitrate, file size, frame rate and compression parameters.
Web
9 tools
Web tools: SEO checks, URL encoding, response time and DNS lookups.
🔥 Hot Tools
View All →Basic
Perform arithmetic calculations with expression support
HOTUnit Converter
Convert between units of length, mass, temperature, area, volume, speed, time, data, energy, power and pressure.
Percentage
Calculate percentages, percent change, and percent difference
Currency Converter
Convert between major world currencies
Time Duration
Calculate duration between two dates and times
Area
Calculate area of various shapes
RGB Converter
Convert between RGB, HEX, HSL, and CMYK color formats
Body Fat
Calculate body fat percentage using the US Navy method
BMI
Calculate your Body Mass Index and health category
Compound Interest
Calculate compound interest on investments with regular contributions
Loan
Calculate monthly payments for personal, auto, or any loan type
Scientific Notation
Convert to/from scientific notation and perform operations
Standard Deviation
Calculate standard deviation and variance
Z-Score
Calculate z-score and normal distribution probabilities
Statistics
Calculate comprehensive statistics for a data set
Tip
Calculate tip amount and split bills between multiple people
Mortgage
Calculate monthly payments, view amortization schedule, and visualize your loan
Ideal Weight
Calculate ideal body weight using multiple formulas
Water Intake
Calculate daily water intake needs
Age
Calculate exact age from birthdate in years, months, and days
Depth of Field
Calculate DoF from aperture, focal length, and distance
Hyperfocal Distance
Calculate hyperfocal distance for maximum depth of field
Golden Hour Guide
Calculate golden hour times based on your location
ND Filter
Calculate exposure time with ND filters
Why use Baike Calc
Runs locally, no data trail
All calculations happen inside your browser. Your inputs never reach a server and vanish when you close the tab.
Open formulas you can verify
Every tool page states the algorithm, the formula and its assumptions, so you can check each step yourself.
No sign-up, completely free
No account, no email address, no daily usage cap. Just open the page and start calculating.
19 categories and growing
From everyday percentage math to server virtualization capacity planning, the library keeps expanding.
Blog
In-depth guides built around real scenarios, explaining the formulas and the trade-offs, each linked to a tool you can try right away.
Formula scale-up base: four to two instead of a simple halving
Linear scaling is possible, but the temperature, fermentation and heating times are judged separately, otherwise the taste and taste change.
Measurement of the cup: How many milligrams of a glass is it?
An American-style glass of about 240 ml, but different countries have different cups, and blending standards will quietly destroy the formula.
Nutritional conversion guidelines: how to recalculate the calorie protein from birth to ripening Heavy
Water loss becomes lighter after cooking the food, which is overrated by well-recognised nutrients, which divides the calorie and converts.
How do you calculate each cost?
The price of a single bottle of oil is low but small, and it is often the staple foods and losses that determine the price, not the price on the shelf.
How do you translate a cup of flour and a cup of sugar?
Volume conversion depends on density, same cup, flour about 120 grams and sugar about 200 grams, which must never be applied to the same number.
Common conversion errors: These pits turn over half the usual food.
The three most high-frequency errors in the kitchen conversion are mixed standards, neglected density and static, which can be much more stable if avoided.
How does the mortgage rate compare: Equivalent principal, Equivalent principal and LPR?
Compared with the interest rate on the mortgage, the repayment method determines the total interest on your actual expenditure, and the error may be hundreds of thousands more.
Whether or not to pay in advance: calculate the opportunity cost and then decide.
Interest was saved on early repayments and the possibility of the money being invested in other investments was abandoned, depending on the difference between the two.
Frequently asked questions
Are these tools really free?
Yes. Every calculator and converter on this site is free to use, with no account required and no daily usage cap. The site is supported by advertising, which covers hosting and development costs but never affects the accuracy of any result.
Is the data I type uploaded to a server?
No. For the vast majority of tools the calculation runs entirely in your browser and your input never leaves your device. A small number of tools that need external data, such as live exchange rates, request it from public sources, but they do not record or store the specific values you enter.
Can I use the results for tax filings or medical decisions?
No. The tools provide estimates for general reference. Financial results are not a substitute for professional tax advice, and health results are not a diagnosis. For decisions that matter, consult a licensed professional.