免費線上計算與實用工具
Aster Tools 是一個持續成長的線上計算工具集合，快速又準確。 無需註冊、免安裝——每次計算都在你的瀏覽器中私密完成。
熱門工具
財務
查看全部 →貸款、利息、小費與儲蓄——金錢計算輕鬆搞定。
🏦貸款計算器免費貸款計算器。根據貸款金額、利率與期限，估算個人、汽車或就學貸款的每月還款額、總利息與總費用。🏡房貸計算器免費房貸計算器。根據房屋總價、頭期款、利率與期限，估算每月還款額、總利息與總費用。📈複利計算器免費複利計算器。看看在定期投入下，你的儲蓄與投資如何隨時間成長。🧾小費計算器免費小費計算器。計算任何帳單的小費，在多人之間分攤，並立即顯示每人應付金額。🏷️折扣計算器免費折扣計算器。輸入原價與折扣百分比，即可看到特價後的價格，以及你確切省下多少。💹日本新 NISA 試算Free New NISA (新NISA) simulator. Project your tax-free investment growth in Japan's NISA and see how much tax you save versus a taxable account.🎁日本故鄉稅（ふるさと納税）試算Free furusato nozei (ふるさと納税) calculator. Estimate your donation limit from salary and family — donate up to it for only ¥2,000 out of pocket.💴日本實領薪資（手取り）Free Japan take-home pay (手取り) calculator. Estimate your net salary after income tax, resident tax and social insurance, per year and per month.🏠日本房貸＋固定資產稅試算Free Japan home-ownership cost calculator. Estimate your monthly mortgage payment plus fixed-asset tax and city-planning tax (固定資産税・都市計画税) — the real monthly cost.🏛️日本遺產稅・贈與稅試算Free Japan inheritance tax (相続税) and gift tax (贈与税) calculator. Estimate the total inheritance tax from the estate and heirs, or annual gift tax after the ¥1.1M exclusion.🔁訂閱費用計算機免費訂閱費用計算機。輸入所有定期訂閱，立即看出每月與每年的花費，找出該取消的服務。📉債務清償計算機免費債務清償計算機。輸入你的債務，選擇雪球法或雪崩法，看出多久能還清以及要付多少利息。📊預算計算機（50/30/20）免費 50/30/20 預算計算機。輸入每月稅後收入，看出該如何分配到必要支出、想要支出與儲蓄。百分比可自行調整。🎯儲蓄目標計算機免費儲蓄目標計算機。輸入目標金額、已存金額與每月存入額，看出需要多久達成，並可選填利息成長。💳信用卡還款計算機免費信用卡還款計算機。看出以固定還款額多久能還清，或在目標期間內所需的還款額，以及利息總額。🏡房貸可負擔金額計算機免費房貸可負擔計算機。輸入收入、債務與頭期款，依 28/36 法則估算你能負擔的房屋價格與貸款金額。🧾美國銷售稅計算機Free US sales tax calculator. Pick your state, add any local rate, and get the sales tax and total price — using 2024 state base rates.💷英國實領薪資計算機Free UK salary calculator. Enter your gross salary to see your take-home pay after income tax and National Insurance, per year and per month (2024/25).💶德國增值稅（VAT）計算機Free German VAT calculator. Work out the Umsatzsteuer (19% or 7%) — net, tax and gross amounts, forwards or backwards.💸EMI Calculator (India)Free EMI calculator for India. Enter your loan amount, interest rate and tenure to get the monthly EMI, total interest and total payment for home, car or personal loans.📈SIP Calculator (India)Free SIP calculator for India. Estimate the future value of your monthly mutual-fund SIP — see the amount invested, estimated returns and total maturity value.🧾GST Calculator (India)Free India GST calculator. Add GST to a price or remove it from a GST-inclusive amount, with the CGST/SGST or IGST split — using the GST 2.0 slabs (5%, 18%, 40%).🪙Income Tax Calculator (India)Free India income tax calculator for FY 2026-27 & FY 2025-26. Compare the new and old tax regimes side by side and see which one means less tax on your salary.🏦PPF Calculator (India)Free PPF calculator for India. See your Public Provident Fund maturity value, total invested and interest earned at the current 7.1% rate over a 15-year term.🏧FD Calculator (India)Free fixed deposit calculator for India. Enter your deposit, interest rate and tenure to get the maturity amount and interest earned, with quarterly compounding.💶Brutto-Netto-Rechner (Germany)Kostenloser Brutto-Netto-Rechner 2026. Berechne dein Nettogehalt aus dem Brutto — mit Lohnsteuer, Soli, Kirchensteuer und Sozialversicherung (2026er Werte).🚗Kfz-Steuer-Rechner (Germany)Kostenloser Kfz-Steuer-Rechner. Berechne die jährliche Autosteuer aus Hubraum und CO₂-Ausstoß für Benziner und Diesel (§9 KraftStG, Stand 2026).💵Paycheck Calculator (US)Free US paycheck calculator for 2026. Estimate your take-home pay after federal income tax and FICA (Social Security & Medicare), per year and per paycheck.🏦401(k) Calculator (US)Free 401(k) calculator for 2026. Project your retirement balance from your contributions, employer match and expected return, with the 2026 IRS limits.🏠Stamp Duty Calculator (UK)Free UK stamp duty (SDLT) calculator for England & Northern Ireland. Work out the SDLT on a home for standard, first-time and additional-property buyers.💷VAT Calculator (UK)Free UK VAT calculator. Add 20% (or 5%) VAT to a net price or remove VAT from a gross amount, with the net, VAT and gross figures.
健康
查看全部 →身體、健身與懷孕計算工具，照顧每天的健康。
日期與時間
查看全部 →計算年齡、期間，以及兩個日期之間的天數。
數學
查看全部 →百分比與日常的快速計算。
轉換工具
查看全部 →貨幣、單位、溫度——一鍵轉換任何東西。
文字
查看全部 →字數統計與日常寫作小工具。
溝通
查看全部 →協助撰寫清楚、體貼訊息的實用工具。