Calculator for Marketer
61 calculator tools hand-picked for Marketer.
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Age Calculator
Calculate your exact age — years, months, days, hours. Compare two dates or count to a future date.
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Annuity Calculator
Annuity & retirement calculator — see monthly income from your savings, accumulation + payout phases, multiple scenarios.
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BaZi (Four Pillars) Calculator
BaZi (Four Pillars) calculator — Chinese metaphysics birth chart with 8 characters, five elements analysis.
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BMR Calculator
BMR calculator — basal metabolic rate by Mifflin-St Jeor and Harris-Benedict (compared side-by-side).
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Calorie Calculator
Calorie calculator — daily calorie needs (BMR + TDEE), weight loss/gain targets, macro breakdown.
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Car Loan Calculator with Prepayment
Car loan calculator with prepayment — bank vs 4S dealer financing comparison, equal-installment / equal-principal / balloon plans, prepayment-savings simulation.
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Child Adult-Height Predictor
Child adult-height predictor — 3 scientific methods (mid-parental / Khamis-Roche / CDC growth percentile), with confidence range + growth chart.
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China Child Vaccine Schedule (0-6y)
China 0-6y child immunization schedule — 11 free + 12 paid vaccines, generates personalized calendar from baby's birthdate, with per-dose reminders.
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China Company Income Tax Calculator
China company income tax calculator — small/micro (2.5%/5%/25%) vs general taxpayer, R&D super-deduction, loss carry-forward 5 years.
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China Drunk-Driving Penalty Reference
China drunk-driving penalty reference — BAC threshold (20/80), license suspension/revocation, criminal charges, insurance impact, by scenario.
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China Unemployment Benefits Calculator
China unemployment benefits calculator — monthly amount + total months by city + insurance years, per 2026 policy.
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China Gaokao Major Recommender (2026, 3+1+2 New Gaokao)
China gaokao major recommender 2026 — filter by score range + subject combo (3+1+2) + interest + employment outlook, 150+ undergrad majors across 12 disciplines.
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China Housing Provident Fund Loan Calculator
China housing-provident-fund loan calculator — single + dual contributor max loan, monthly payment (equal-principal + equal-installment), top-30 cities 2025 caps.
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Chinese Lunar Almanac (Huangli)
Chinese lunar almanac (huangli) — daily 宜/忌 advice, 24 solar terms, 干支/生肖, auspicious hours, any date 1900-2100.
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China Marriage Betrothal Reference
China marriage betrothal reference — 30+ provinces' typical betrothal money + dowry + 3-gold/5-gold averages (2024-2026 public data).
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China Maternity Benefits Calculator
China maternity benefits calculator — leave days by province (98 base + extension 30-180 days), maternity allowance (avg-wage × leave-days / 30), medical reimbursement, 2025 policy.
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Chinese Numeric Converter
Arabic ⇄ Chinese number — simple (一二三), formal (壹貳參), or amount (金额大写 with 元角分).
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China Pension Calculator
China pension calculator — basic + personal-account + transitional pension formulas (2024 reform), by province average wage, contribution years, base, with 2055 projection.
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China Personal Income Tax — Special Deduction Simulator
China personal income tax special deduction simulator — 7 categories (kids/elder/mortgage/rent/education/medical/infant), year-end reconciliation included.
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China Retirement Age Calculator
China retirement age calculator (2025 reform) — exact retirement date by birth year + gender + worker category, per Sept 2024 NPC reform.
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China Three-Child Birth Subsidy Policy Finder
China three-child birth subsidy policy finder — per province / city one-time + monthly + housing + education subsidies (2024-2025 latest).
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China Used-Car Price Estimator
China used-car price estimator — depreciation curve by brand tier + age + mileage + condition, plus 4S trade-in vs private vs auction net comparison.
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Chinese Zodiac Sign Checker (Sheng Xiao)
Chinese zodiac checker — your animal sign, element, compatibility, lucky numbers/colors by birth year.
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Churn Rate Calculator
Churned ÷ starting customers = churn % — retention, monthly→annual, average lifetime, optional MRR churn — browser-only
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Clothing Size Converter
US ⇄ UK ⇄ EU ⇄ CN ⇄ S–XXL for men & women — tops, trousers, dresses, suits — with the body measurements behind every size — browser-only
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Compound Interest Calculator
Compound interest calculator — see how money grows over time, with monthly contributions, charts, and breakdown.
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Western Zodiac Calculator (Sun Sign)
Western zodiac calculator — your sign, element, ruling planet, compatibility, daily traits.
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Conversion Rate Calculator
Conversions / visitors, solve for any of the three, plus A/B uplift and visitors needed for a goal. Browser only.
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Countdown Timer
Countdown timer — to any date and event, with live ticking down to seconds.
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CPM Calculator
CPM = ad spend ÷ impressions × 1000 — solve for spend, impressions or CPM, plus CPC, CTR and CPA off the same budget — browser-only
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Currency Converter
Currency converter — 50+ currencies with offline reference rates, convert without internet, source data updated each release.
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Customer Lifetime Value Calculator
CLV / LTV for SaaS and e-commerce — simple and SaaS formulas, LTV:CAC health check, one-click copy — runs in your browser
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Discount Calculator
Sale price, amount saved, % off — plus stacked discounts, BOGO, spend-X-save-Y, tax, and reverse % — instant, browser-only
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Expense Tracker
Expense tracker — log spend, categorize, see monthly totals, all in your browser.
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Inflation Calculator
See what your money is really worth — future value, purchasing power, and the rule-of-72 halving point, all from one inflation rate
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Loan Comparison Calculator
Loan comparison calculator — compare equal-payment vs equal-principal, multiple loans side by side, total interest breakdown.
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Loan Prepayment Calculator
Loan prepayment calculator — see how much interest you save by paying extra each month or one-time, with breakeven analysis.
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Lunar Calendar Converter (Chinese Nongli)
Gregorian ⇄ Chinese Lunar (Nongli) calendar — bi-directional, accurate 1900-2100.
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Markup & Margin Calculator
Cost ⇄ price ⇄ markup % ⇄ margin % — solve any two, see both rates side by side — 100% in your browser
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Meeting Cost Calculator
Meeting cost calculator — see how much that meeting is costing in real-time, with team salary data and overhead multiplier.
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Mortgage Calculator
Mortgage calculator — monthly payment, total interest, amortization schedule, early payoff scenarios.
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Number Formatter
One number in, every format out: thousands grouping, currency, percent, scientific, engineering, compact (K/M/万), ordinal, byte size — plus reverse parsing. 100% browser-only.
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China Overtime Pay Calculator
China overtime pay calculator — workday 1.5×, weekend 2×, statutory holiday 3× per Labor Law Art. 44, with 31 provincial minimum-wage tables.
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Payment Processing Fee Calculator
Stripe, PayPal, Square fees — see what lands in your account, and gross-up to net any target — 100% in your browser
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Percentage Calculator
5 common percentage calculations — "x% of y", "x is what% of y", percentage change, increase/decrease — instant, browser-only
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Percentage Change Calculator
Growth rate, drop, percentage-point gap, and reverse-solve the new value — signed, color-coded, browser-only
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Pregnancy Due Date Calculator
Pregnancy due date calculator — track weeks, trimester, baby development by week.
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China Property Fee Calculator
Property fee calculator — calculate Chinese residential management fees, garage, heating, elevator, with regional rate references.
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Random Number Generator
Generate cryptographically-secure random integers — single or batch, with/without duplicates — browser-only
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Ring Size Converter
US ⇄ UK ⇄ EU ⇄ JP ⇄ CN ⇄ inner circumference & diameter (mm) — type any one, get every size at once — browser-only
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ROI Calculator
ROI %, net gain, annualized ROI (CAGR) and payback period — one screen, share a link — 100% in your browser
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Salary to Hourly Converter
Hourly ⇄ daily ⇄ weekly ⇄ monthly ⇄ annual pay — set your hours/week and weeks/year, see all five at once — browser-only
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Sample Size Calculator
How many people to survey for a given confidence and margin of error — finite-population correction, reverse mode, one-click copy, browser-only
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Shoe Size Converter
US ⇄ UK ⇄ EU ⇄ CN ⇄ JP + foot length (cm/in) — men, women, kids — browser-only
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TDEE Calculator
TDEE calculator — BMR × activity factor, with cut/bulk calorie targets and projected weekly weight change.
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Timezone Converter
Convert any time between any two timezones — DST-aware, IANA database — browser-only
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Timezone Meeting Planner
Plan meetings across timezones — see when everyone's working hours overlap.
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VAT / Sales Tax Calculator
Add tax, remove tax, or find the rate — net ⇄ gross at any VAT / GST / sales-tax rate — instant, browser-only
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China Vehicle Purchase Tax Calculator
China vehicle purchase tax calculator — 10% rate on tax-exclusive price, with NEV exemption rules, plus on-road cost breakdown.
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Wedding Budget Planner
Wedding budget planner — itemized cost calculator with regional benchmarks for venue, photography, catering, etc.
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Work Anniversary Calculator
Work tenure calculator — service years, annual leave entitlement (China), retirement countdown.