◆ 1024Toolkit

All tools

All 62 tools in one place, listed A–Z. No sign-up, no upload — everything runs in your browser.

A

  • A1C to Average Glucose Converter Convert A1C to estimated average glucose (eAG) in mg/dL or mmol/L and back, with the ADA reference chart. Runs entirely in your browser.
  • Air Conditioner BTU Calculator Work out the cooling capacity a room needs. Enter floor area, ceiling height and sun exposure to get BTU per hour, watts and refrigeration tons.
  • Appliance Energy Cost Calculator Find out what an appliance costs to run: enter the wattage, hours used per day, standby draw and your electricity price to get daily, monthly and yearly cost.
  • Aspect Ratio Crop Calculator Fit a clip into a target aspect ratio and see exactly what gets cropped or letterboxed — for both cover and contain — with the crop rectangle and the loss in pixels. Runs entirely in your browser.

B

  • BMI Calculator Work out your body mass index from metric or imperial measurements, see the WHO weight category and the healthy weight range for your height. Nothing you type leaves your browser.
  • BMR Calculator Calculate your basal metabolic rate with three formulas side by side — Mifflin-St Jeor, Harris-Benedict and Katch-McArdle — in metric or imperial units. See why they disagree and which one fits you.
  • Bowling Score Calculator Score a ten-pin bowling game from any roll sequence, with a frame-by-frame scorecard, correct strike and spare bonuses and the tenth-frame three-ball rules.
  • Bracket Generator Turn a list of players into a single-elimination bracket that respects seeding, with byes given to the top seeds and top seeds kept apart until the final.
  • Braking Distance Calculator Total stopping distance split into thinking and braking distance, with road surface friction, reaction time and downhill grade taken into account.

C

  • Compound Interest & DCA Calculator Work out what regular investing adds up to — initial sum, monthly or yearly contributions, a chosen rate basis, and inflation-adjusted buying power, year by year. Nothing you type leaves your browser.
  • Concrete Calculator Work out how much concrete a slab, round column or hollow pier needs. Volume in cubic yards or meters, bag counts for common mix sizes, and weight.
  • Cron Expression Explainer Paste any cron expression to see what it means in plain English and exactly when it will run next — in your own time zone, DST included.
  • CSS Gradient Generator Build a linear, radial or conic gradient and see the colours in between — interpolated in sRGB, linear light or OKLab — then copy the CSS. Runs entirely in your browser.
  • Cut List Optimizer Work out how many sheets of plywood, MDF or board a cut list needs. Lays the parts out on each sheet, applies the blade kerf, and reports the yield and the offcuts.

D

  • D&D Point Buy Calculator Enter six ability scores and see what each one costs under the 5e point-buy table, how many of your 27 points are left, and how far the leftovers can lift one score.
  • Depth of Field Calculator Work out the depth of field, near and far limits and the hyperfocal distance for any lens and aperture, with the circle of confusion matched to your sensor.
  • Dice Probability Calculator Enter a dice expression such as 2d6+1d8 and get the full sum distribution, the expected roll, and the odds of rolling at least a target number.

E

  • Excel List Compare & De-duplicate Paste two name lists from Excel, Sheets or CSV and see what matches, what is unique to each side, and which entries are duplicates or near-misses. Nothing leaves your browser.

F

  • Final Grade Calculator Enter your current grade, the weight of the final, and the grade you want — and see exactly what you need on the final, or that it cannot be reached even with a perfect score.

G

  • Gacha Pity Calculator Work out the expected number of pulls for a 5-star, the median and 90th percentile, and how many pulls are left from your current pity count.
  • Golden Hour & Sun Position Calculator Find the golden hour, blue hour, sunrise, sunset and twilight times for any date and place — with the direction of the sun, so you know which way to shoot.
  • GPA Calculator (4.0 Scale) Courses with credits and grades — letter or percent — become a weighted 4.0-scale GPA, with per-course breakdown and cumulative GPA. Nothing you type leaves your browser.
  • Great Circle Distance Calculator Distance between two points on the globe from latitude and longitude — decimal or DMS — in km, miles and nautical miles, plus initial and final bearing. Nothing leaves your browser.

H

  • Heart Rate Zone Calculator Find your five heart-rate training zones from age and resting heart rate. Four max-HR formulas and both the %HRmax and Karvonen methods, side by side.

I

  • IP Subnet Calculator Work out the network address, broadcast address, host range and mask of any IPv4 or IPv6 CIDR — and check whether an IP belongs to it. Nothing leaves your browser.

J

  • JSON / YAML / TOML Converter Paste JSON, YAML or TOML and get the other two back, with syntax errors pinned to the exact line and column. Runs entirely in your browser — nothing you paste is uploaded.

L

  • Life in Weeks Your whole life as one square per week: weeks lived, weeks left and the share already used, from any birth date and any life expectancy.
  • Lunar Calendar Converter Convert between Gregorian and Chinese lunar dates, including leap months, the zodiac animal and the sexagenary year name, for any date from 1900 to 2099.

M

  • Macro Calculator Split a daily calorie target into protein, carbs and fat by percentage, or pin protein first and divide the rest. Shows grams, calories and grams per kilo side by side.
  • Matrix Calculator Multiply, transpose, invert and find the determinant of matrices. Partial pivoting keeps results stable, and a singular matrix reports no inverse instead of a screen of NaN.
  • Minecraft Circle Generator Enter a diameter to get the exact row widths, block count and layer plan for a circle, sphere or cylinder built from Minecraft blocks.

N

  • ND Filter Long Exposure Calculator Turn a shutter speed and an ND filter into the exposure time you actually need — entered as filter number, density or stops, and snapped to the nearest setting on a real shutter dial.
  • Number to Words Converter Spell any number in English — cardinals, ordinals, currency amounts and years — with US or UK wording. Full accuracy up to 36 digits, no rounding.

O

  • Options Payoff Diagram Combine any legs — long or short calls, puts and stock — and see the payoff at expiration: breakeven points, max profit and max loss, drawn to scale.

P

  • Phone Number Validator & Formatter Validate any phone number against the official numbering plans, see whether it is real or just plausible, and get E.164, international, national and RFC3966 formats side by side.
  • Position Size & Risk Calculator Work out how many units a fixed slice of the account can risk, what the trade pays right against wrong, and what full, half or quarter Kelly staking would be. Runs entirely in your browser.
  • Px ↔ Rem Converter Convert px to rem and back at any root font size — one value or a whole CSS block at once. Only the source unit is rewritten, and a reference table covers common sizes.

R

  • Random Group Generator Paste a list of names and split it into random groups — by how many groups you want or by how many people each group holds. The same list and seed always give the same result.
  • Readability Score Calculator Paste English text to get its Flesch reading ease, grade level, Gunning Fog and SMOG scores, plus word, sentence and syllable counts and reading time. Runs entirely in your browser.
  • Recipe Scale Calculator Scale a recipe up or down and get kitchen-friendly amounts: fractions that fit real measuring spoons, unit promotion, and a clear note when a pinch is deliberately left alone.
  • Regex Tester & Explainer Test a regular expression against your own text, see every match and capture group highlighted, get each piece of the pattern explained, and check what JavaScript, PCRE and RE2 actually support. Everything runs in your browser.
  • Round Robin Schedule Generator Build a fair round robin schedule for any number of teams, with automatic byes for odd counts and balanced home and away games.
  • Running Pace Calculator Solve for running pace, time or distance — enter any two and the third is worked out, with speed and both kilometers and miles shown instantly.

S

  • Savings Rate → Financial Independence Calculator How many years does your savings rate buy you? Or what rate does a chosen deadline demand? Real, inflation-adjusted terms, with the 4% rule built in. Nothing you type leaves your browser.
  • Sleep Cycle Calculator Work out what time to go to bed for a chosen wake-up time, or when to wake up if you lie down now. Splits the night into 90-minute cycles and keeps lying down separate from falling asleep.
  • Speaking Time Calculator Estimate how long a script takes to read aloud at four speaking paces — Chinese counted in characters, English in words, pauses included. And work backwards from a target length.
  • SQL Formatter & Dialect Converter Format SQL and translate it between MySQL, PostgreSQL and SQLite. Every change is listed, and anything that cannot be translated safely is flagged instead of guessed — all in your browser.
  • Stacked Discount Calculator Apply percent-off steps and fixed coupons in order and see what each deducts, the true final price, the single equivalent discount, and how far off the naive sum would be.
  • Stair Calculator Work out the number of steps, the true height of each step, tread count, total run, stringer length and angle from your floor-to-floor rise.
  • Stock Board Your watchlist and the whole A-share market board in one place: live quotes, intraday and candlestick charts, index levels, breadth, the limit-up ladder and capital flows.

T

  • TDEE Calculator Total daily energy expenditure: BMR (Mifflin-St Jeor) times five standard activity levels, in one full table — plus calorie targets for losing, maintaining or gaining.
  • Test Data Generator Generate names, emails, usernames, UUIDs, IP and MAC addresses, Luhn-valid card numbers and more — seeded so the same seed always yields the same rows, entirely in your browser.
  • Time Zone Converter Convert a date and time across time zones, with correct daylight-saving handling — including wall-clock times that do not exist on that date.
  • Timecode ↔ Frames Converter Convert between SMPTE timecode and frame numbers at any frame rate — including drop-frame, where 00:01:00;00 does not exist. Shows the exact duration too.
  • Tire Size Comparison Calculator Compare two tire sizes: overall diameter, width and sidewall change, speedometer error, ride height, gearing and fitment warnings.
  • Triangle Calculator Solve any triangle from three known values — SSS, SAS, ASA, AAS and the ambiguous SSA case — with area, perimeter, circumradius and inradius. SSA shows both possible triangles, not just one.
  • Typing Speed Test Calculator Work out your typing speed: WPM on the standard 5-characters-per-word rule, net speed after errors, accuracy and a rating. English in words per minute, Chinese in characters per minute.

U

  • Unit Price Calculator Compare packages by what they actually cost per gram, per millilitre or per item. Ranks each family separately and flags the big pack that is not the cheapest.
  • Unix Timestamp Converter Convert between Unix timestamps and readable dates in any time zone. Seconds or milliseconds are detected for you — and nothing you type leaves your browser.

V

  • Video File Size Calculator Estimate a video file size from duration and bitrate — video and audio tracks plus container overhead — and see how long a given card or upload limit will hold.

W

  • Weather Lookup Current weather and a 7-day forecast for any city. No account, no API key — data straight from Open-Meteo.
  • Weighted Grade Calculator Add each graded item weight and score — percent weights or earned-over-possible points — to get the weighted grade so far, with a floor and ceiling for what is not graded yet.