diff --git a/class/legacy-wallet.js b/class/legacy-wallet.js
index 892ab5b46..bbfa8af7c 100644
--- a/class/legacy-wallet.js
+++ b/class/legacy-wallet.js
@@ -97,8 +97,11 @@ export class LegacyWallet extends AbstractWallet {
         throw new Error('Could not fetch UTXO from API' + response.err);
       }
 
-      this.balance = json.final_balance / 100000000;
-      this.unconfirmed_balance = json.unconfirmed_balance / 100000000;
+      this.balance = new BigNumber(json.final_balance);
+      this.balance = this.balance.div(100000000).toString() * 1;
+      this.unconfirmed_balance = new BigNumber(json.unconfirmed_balance);
+      this.unconfirmed_balance =
+        this.unconfirmed_balance.div(100000000).toString() * 1;
       this._lastBalanceFetch = +new Date();
     } catch (err) {
       console.warn(err);
diff --git a/loc/index.js b/loc/index.js
index 6d091ba30..1f4c43dda 100644
--- a/loc/index.js
+++ b/loc/index.js
@@ -2,6 +2,7 @@ import LocalizedStrings from 'react-localization';
 import { AsyncStorage } from 'react-native';
 import { Util } from 'expo';
 import { AppStorage } from '../class';
+let BigNumber = require('bignumber.js');
 let strings;
 
 // first-time loading sequence
@@ -65,7 +66,8 @@ strings.transactionTimeToReadable = function(time) {
 
 strings.formatBalance = function(balance) {
   if (balance < 0.1 && balance !== 0) {
-    return balance * 1000 + ' mBTC';
+    let b = new BigNumber(balance);
+    return b.mul(1000).toString() + ' mBTC';
   }
   return balance + ' BTC';
 };