オンライン計算機・便利ツールの検索
ブラウザ上で直接動作する無料の計算ツール、単位換算、実用ユーティリティを検索・利用できます。
人気のツール・計算機
swp calculator
in: total investment, monthly withdrawal, expected return % p.a., years, optional yearly step-up % of withdrawal. out: total withdrawn, final balance, year-wise table + chart. Monthly loop: bal = bal*(1+r/12) - w. Flag when corpus runs out.
pf calculator
EPF corpus. in: monthly basic+DA, employee % (12), employer % (12; 8.33% goes to EPS capped on 15,000 wage), current age, retire age, annual salary hike %, current balance, EPF rate (default from data/rates.json, editable). out: corpus at retirement, own vs employer split, interest earned, year table.
discount calculator
modes: (1) price + discount % -> final price, you save; (2) price + final price -> discount %; (3) two successive discounts -> effective %. Optional tax % on final.
attendance calculator
in: total classes held, classes attended, target % (default 75). out: current %, classes to attend to reach target = ceil((p*t-100*a)/(100-p)), classes you can still miss = floor(100*a/p - t).
cat score calculator
CAT raw score. in: per-section (VARC, DILR, QA) MCQ correct/wrong, TITA correct. +3 correct, -1 wrong MCQ, TITA no negative; question counts from data/exams.json (verify against latest official notice). out: section & total score. No percentile claims.
how to calculate cgpa to percentage
in: CGPA, scale (10/4), university rule selector from data/cgpa-rules.json: CBSE x9.5, VTU (CGPA-0.75)*10, custom multiplier. out: percentage + formula shown with the numbers. Page also answers reverse (percentage -> CGPA) via toggle.
webp to jpg
Canvas decode -> toBlob('image/jpeg', q). Drag&drop multi-file, quality slider, white background for transparency, per-file download + ZIP (fflate lazy-loaded).
dpi converter
Two tools: (1) calculator inches x DPI = pixels (both directions); (2) change DPI metadata of JPG/PNG (write JFIF density / PNG pHYs chunk client-side, no resample).
image to jpg
Any browser-decodable image (PNG, WebP, AVIF, BMP, GIF) -> JPG via canvas; note HEIC unsupported in most browsers; batch + ZIP.
calorie calculator
Mifflin-St Jeor BMR: 10w+6.25h-5a+5 (male) / -161 (female). TDEE = BMR * activity (1.2, 1.375, 1.55, 1.725, 1.9). Goals: lose -500, gain +500, mild +/-250. out: BMR, TDEE, targets, macro split suggestion. Metric/imperial toggle.
ideal weight calculator
Formulas: Devine (M 50+2.3*in over 60; F 45.5+2.3*...), Robinson, Miller, Hamwi + healthy BMI range 18.5-24.9 for the height. Show all, average, not medical advice.
body shape calculator
in: bust, waist, high hip, hip (cm/in), optional shoulder. Classify female shapes (hourglass, pear, apple, rectangle, inverted triangle) by ratio rules; fun/style tool, clear disclaimer.
est to ist
Time converter using Intl / IANA zones: America/New_York -> Asia/Kolkata (handles EST vs EDT by date). in: date, time, direction toggle. out: converted time, offset now, table of common hours. Explain EST vs EDT.
experience calculator
in: start date, end date (or 'today'), multiple job rows. out: years-months-days per row and total, total days, decimal years. Handle overlaps toggle.
cst to ist converter
Same converter engine: America/Chicago -> Asia/Kolkata (CST/CDT aware).
square feet calculator
(Verify intent.) Area calculator: rectangle, triangle, circle, trapezoid in ft/in/m/cm; out sq ft, sq m, sq yd; multiple-room total; +wastage %.
resin calculator
Epoxy resin volume. in: shape (rect/round), dimensions, depth, unit; mix ratio (1:1, 2:1), density default 1.1 g/ml, +10% waste. out: total volume ml/fl oz, weight, part A / part B.
house construction cost calculator
in: built-up area sq ft, floors, quality tier. Cost/sq ft table in data/construction-costs.json (editable defaults, region-tagged). out: total range and breakdown (structure, finishing, electrical, plumbing...). Clear 'estimate' disclaimer.
meters to feet
Bidirectional: ft = m*3.28084; also feet+inches display. Table of common values. Shared UnitConverter component.
grams to lbs
lb = g*0.00220462; also oz, kg. Bidirectional table.
mb to kb converter
Show both decimal (1 MB = 1000 KB) and binary (1 MiB = 1024 KiB); explain difference; convert among B..TB.
lo shu grid
From DOB (dd mm yyyy) fill 3x3 grid [[4,9,2],[3,5,7],[8,1,6]] with digit counts; list missing numbers, repeating numbers, Mulank & Bhagyank, row/column/diagonal 'planes'. Original interpretive text for numbers 1-9. Absorbs 'loshu grid'.
name numerology calculator by date of birth
Pythagorean (A=1..I=9,J=1...) and Chaldean tables; name number + life-path (from DOB) + destiny; original meaning text for 1-9 and master numbers 11/22/33.
mulank calculator
Mulank (driver number) = day of birth reduced to 1-9. Meanings, lucky attributes as 'traditional beliefs', entertainment disclaimer.
devlys to unicode
Devlys 010 legacy Devanagari font -> Unicode Devanagari via mapping table + reph/chhoti-ee reordering. Fixed direction; cross-links to /font-converters/unicode-to-devlys/.
krutidev to unicode
Kruti Dev 010 legacy text -> Unicode Devanagari via mapping table + reordering rules (chhoti ee ki matra, reph, half-letters). Live convert, copy, and reverse (Unicode->Kruti Dev) optional. Unit-test with known sample strings. Check licence of any mapping source.
chanakya to unicode
Chanakya legacy Hindi font (newspaper publishing) -> Unicode Devanagari via mapping table. Fixed direction; cross-links to /font-converters/unicode-to-chanakya/.
json beautifier
Paste/type JSON -> beautify with 2/4/tab indent, sort keys option, copy & download output. Full client-side validation with error highlighting.
json parser
Parse JSON string -> show parsed key/value pairs as pretty-printed object tree, data type list, key count. Error reporting with position.
json editor
Edit JSON in textarea with live validation status, line count, char count, key count. Copy and download output.
love calculator
Entertainment only. Deterministic result from two names (normalised hash -> 40-99%), same input always same output; result message tiers. Prominent 'for fun' note; no data stored.
simplify calculator
(S3-lite) Simplify fractions, radicals and algebraic expressions with steps. Use math.js simplify, lazy-loaded ONLY on this page. Verify intent (algebra) via SERP.
epoch converter
Unix timestamp <-> human date; auto-detect seconds/ms; UTC and local; live current epoch; copy buttons; ISO 8601 output.