*,*::before,*::after{box-sizing:border-box;margin:0;padding:0} :root{ --bg0:#0d0f11;--bg1:#131619;--bg2:#1a1e22;--bg3:#222830;--bg4:#2c333d; --gold:#c9a84c;--gold2:#e8c96a;--gold-dim:#7a6330; --text:#e8e4dc;--text2:#a09890;--text3:#5a5550; --border:#2c333d;--radius:10px; --mono:'DM Mono',monospace;--sans:'Syne',sans-serif; } html{scroll-behavior:smooth} body{background:var(--bg0);color:var(--text);font-family:var(--sans);min-height:100vh} nav{position:sticky;top:0;z-index:100;background:rgba(13,15,17,0.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 2rem;height:58px;} .logo{font-family:var(--sans);font-weight:800;font-size:1.3rem;letter-spacing:-.02em;color:var(--text);text-decoration:none} .logo span{color:var(--gold)} .nav-links{display:flex;gap:0;list-style:none} .nav-links a{font-family:var(--mono);font-size:.78rem;color:var(--text2);text-decoration:none;padding:.4rem .9rem;border-radius:6px;transition:color .2s,background .2s;letter-spacing:.04em;} .nav-links a:hover{color:var(--gold);background:rgba(201,168,76,.07)} .nav-badge{font-family:var(--mono);font-size:.7rem;color:var(--gold);border:1px solid var(--gold-dim);border-radius:4px;padding:.15rem .5rem;letter-spacing:.06em;} .hero{text-align:center;padding:4rem 1rem 3rem;background:radial-gradient(ellipse 80% 60% at 50% -10%, rgba(201,168,76,.08) 0%, transparent 70%);} .hero h1{font-size:clamp(2rem,4vw,3rem);font-weight:800;letter-spacing:-.04em;margin-bottom:.6rem;} .hero h1 em{font-style:normal;color:var(--gold)} .hero p{color:var(--text2);font-family:var(--mono);font-size:.88rem;letter-spacing:.03em} .main{max-width:780px;margin:0 auto;padding:2.5rem 1.5rem 5rem} .section-title{font-family:var(--mono);font-size:.72rem;letter-spacing:.15em;color:var(--gold);text-transform:uppercase;margin-bottom:1.2rem;padding-bottom:.6rem;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:.6rem;} .section-title::before{content:'';width:6px;height:6px;background:var(--gold);border-radius:50%;flex-shrink:0} .card{background:var(--bg1);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;margin-bottom:2rem;} .card p{color:var(--text2);font-size:.95rem;line-height:1.85;margin-bottom:1rem;} .card p:last-child{margin-bottom:0} .values-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1.5rem;} @media(max-width:600px){.values-grid{grid-template-columns:1fr}} .value-card{background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:1.2rem;} .value-icon{font-size:1.4rem;margin-bottom:.6rem;} .value-title{font-family:var(--mono);font-size:.78rem;color:var(--gold);letter-spacing:.08em;margin-bottom:.4rem;} .value-text{font-family:var(--mono);font-size:.8rem;color:var(--text2);line-height:1.6;} .placeholder{background:rgba(201,168,76,.06);border:1px dashed var(--gold-dim);border-radius:6px;padding:.5rem .9rem;font-family:var(--mono);font-size:.78rem;color:var(--gold);display:inline-block;margin:.2rem 0;} footer{border-top:1px solid var(--border);padding:2rem;text-align:center;font-family:var(--mono);font-size:.72rem;color:var(--text3);letter-spacing:.05em;} footer span{color:var(--gold)} footer a{color:var(--text3);text-decoration:none;transition:color .2s;} footer a:hover{color:var(--gold)}

About A1 CalculatorHUB

Built to make everyday math fast, free, and accessible for everyone.

Our Mission

A1 CalculatorHUB was created with one goal in mind: give everyone access to fast, accurate, and completely free calculation tools — no subscriptions, no sign-ups, no nonsense.

Whether you're crunching numbers at work, managing your household budget, converting units for a recipe, or planning a financial decision, A1 CalculatorHUB has a tool for you. Every calculator on this site works instantly in your browser — no downloads required.

What We Offer

Our growing suite of tools covers everyday math needs across multiple categories:

🔢
Standard & Scientific
Full-featured calculators for everyday arithmetic and advanced mathematical functions.
⚖️
Unit Converters
Instant weight, length, and temperature conversions between all major units.
📊
Financial Tools
Sales tax, percentage, and interest calculators to help you make informed money decisions.
⚡
Always Free
Every tool on A1 CalculatorHUB is completely free to use with no limits, ever.
About the Team

A1 CalculatorHUB is independently owned and operated. We're passionate about building simple, useful tools that work for everyone — from students and professionals to small business owners and curious minds.

Have a suggestion for a new calculator or found an issue? We'd love to hear from you.

Owner / Contact: A1 CalculatorHUB  |  a1calculatorhub@gmail.com